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JavaScript - Highlight The Contents Of All Text Fields?
Hi all,
Please forgive me if this is a dumb question. Is it possible to highlight the contents of all text and/or textareas within one form simultaneously? I've tried to do it using the funciton below, it cycles through allright, but only highlights each field whilst it is in focus, then loses it when it moves to the next field. The result is that only the last text/textarea within the form is highlighted. My aim is to highlight all fields for subsequent spell checking. Any help would be appreciated. Code:
<html>
<head>
<script type="text/javascript">
function SelectText(){
var fields = document.getElementsByTagName("input");
for (var i = 0; i < fields.length; i++){
var node = fields[i];
if (node.getAttribute('type') == "text"){
node.focus();
node.select();
}
}
}
</script>
</head>
<body>
<form id="form1" action="">
<p></p>
<input type="text" id="one" style="width:500px;">
<p></p>
<input type="text" id="two" style="width:500px;">
<p></p>
<input type="button" value="Select Text" onclick="javascript:SelectText();">
</form>
</body>
</html>
Similar TutorialsHi, Here's a sample form: Code: <form action="#" method="post"> Name:<br /> <input type="text" name="name" value="your name" /><br /> E-mail:<br /> <input type="text" name="mail" value="your email" /><br /> <input type="submit" value="Send"> </form> When you tab to a text input, the value gets highlighted. How can it be disabled? Any help is appreciated! Mike Hi, On my webpage I have an embedded link that jumps the users up to a text box for logging in. I'm trying to find a way so when they click that link, it will not only jump up to the text box but highlights it as well. I then want the highlight color to fade back to normal. I've been searching around but I can't find something that will work. Any ideas? Hi, I am having trouble searching for text in a textarea in all browsers. I display formatted text in a textarea with tinyMCE editor. Some of the text contains blanks ('______') which the user needs to find and fill in (usually with a number). I have written a new button on the toolbar of the editor which will find and highlight the blank when clicked. The user will click the button, fill in the text, click the button, fill in the text, etc. In IE the blanks are highlighted just fine. The only problem is: user clicks button and first blank is highlighted. User fills in the text then clicks the button again. Second blank should be highlighted but it skips right to the third blank. If you don't fill anything in, the next blank will be highlighted. If you highlight and then fill anything in, the next blank is skipped and the following blank is highlighted. Any thoughts? But my worst problem is with Mozilla. I get an error. It does not act like setSelectionRange(pos, pos+len(str)) is a valid function call. I receive the following error: "component returned failure code: 0x800004005 (NS_ERROR_FAILURE)[nsIDOMNSHTML TextareElement.setSelectionRange]" Here is my function: var win = window; var n = 0; var str = '______'; function FindBlanks() { var txt, i, found; win = tinyMCE.get('txtPolicy').getDoc(); if (str == "") return false; if (window.execScript) { txt = win.body.createTextRange(); //Find the nth match from the top of the page for (i = 0; i <= n && (found = txt.findText(str)) != false; i++) { txt.moveStart("character", 1); txt.moveEnd("textedit"); } // If found, mark it and scroll it into view if (found) { txt.moveStart("character", -1); txt.findText(str); txt.select(); txt.scrollIntoView(); // n = i--; n++; } //Otherwise, start over at the top of the page and find first match else { if (n > 0) { n = 0; alert("End of document has been reached."); } //Not found anywhere, give message. else alert("No blanks found."); } } else { //document.getElementById('txtPolicy').setFocus; var ht = '______'; if (ht.length == 0) { alert('highlightText has zero lenth'); return false; } var str2 = document.getElementById('txtPolicy').value; var startPos = str2.indexOf(ht); if (startPos == -1) { alert('No blanks found'); return false; } document.getElementById('txtPolicy').focus(); document.getElementById('txtPolicy').setSelectionRange(startPos, startPos + ht.length); return true; if (n == 0) alert ("No blanks found."); } return false; } Can anyone help me with this? Thanks. This might be a little complicated. I'll try to be as clear as possible. I got some help from Old Pedant a little while ago and the code worked great. The problem came after I tried some code that will highlight (select) text in a DIV: Code: <script type="text/javascript">
function selectNode (node) {
var selection, range, doc, win;
if ((doc = node.ownerDocument) && (win = doc.defaultView) && typeof
win.getSelection != 'undefined' && typeof doc.createRange != 'undefined'
&& (selection = window.getSelection()) && typeof
selection.removeAllRanges != 'undefined') {
range = doc.createRange();
range.selectNode(node);
selection.removeAllRanges();
selection.addRange(range);
}
else if (document.body && typeof document.body.createTextRange !=
'undefined' && (range = document.body.createTextRange())) {
range.moveToElementText(node);
range.select();
}
}
</script>
Code: <div id="bb1"></div>
<form>
<input type="button" value="Click Here to Highlight Data" onclick="window.selectNode(document.getElementById('bb1'));" style="margin-left:4px; font-weight:bold; font-family: Verdana, Arial, Helvetica, sans-serif; font-size:14px;">
</form>
It works great with Firefox and Internet Explorer, but there is a problem with Opera. The contents of the DIV is selected, but so is everything after the DIV. Below is a link to the page, but be sure to turn down your speaker volume before you visit the page so you won't have a heart attack: http://www.randomterrain.com/atari-2...music-toy.html The DIV is empty when the page loads. To put content in the DIV, jump down to All Sounds and left click on a couple of the numbers than run from 0 to 31, then jump down to the DIV. When you click on the "Click Here to Highlight Data" button, you'll see that more than the contents of the DIV is selected. I hope someone can figure out how to make the code work properly with Opera. Thanks. Hi, As you will see with the code below when the text ONE and TWO are clicked on it displays a background color. When ONE is activated TWO is off. When TWO is activated ONE is off. But when the page loads I want ONE to display the background color. When ONE displays the background color after the page has loaded, I want to click on TWO to display it's background color and ONE should turn off as it does now. I can't figure out how to activate the background color for ONE when the page loads. Then if it is activated when the page loads, how to turn off ONE and turn on TWO when clicked on and visa versa. Code: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
<script language="javascript" type="text/javascript">
var btn = function () {
var active = null, bcolor = '#84DFC1';
if (this.attachEvent) this.attachEvent('onunload', function () {
active = null;
});
return function (element) {
if ((active != element) && element.style) {
if (active) active.style.backgroundColor = '';
element.style.backgroundColor = bcolor;
active = element;
}
};
}();
</script>
</head>
<body>
<div onclick="btn(this);">ONE </div>
<div onclick="btn(this);">TWO </div>
</body>
</html>
I am building an e-learning lesson in Lectora that will be deployed to a SCROM compatible learning management system. The lesson is converted into HTML before that happens. My table of contents is around 100 pixels wide but some of the page names are longer than that and do not display fully when viewed in a browser. What I am trying to do is this: The page name for this page is very, very long and I can't see it all. Blah blah Would become The page name for this page is very, very long and I can't see it all. Blah blah I've been led to believe there is javascript that will do that. Hello, I've been looking around the web for a simple JavaScript to solve this problem but can't seem to find something that would work both in IE and FF and the other major browsers? So basically I have a page listing about a dozen badges people can use to link back to me. I have presented the code for each badge (eg. a href, img src, alt...) in a separate textarea and I'd really love to add a link next to each textarea that would say something like "Click here to copy to Clipboard" then it would copy the text from within the corresponding textarea to the Clipboard so as to eliminate the need for Ctrl+A, Ctrl+C. Thank you in advance people! I am in need of some help. I have a request from a client to have four text fields added together as soon as they input the number. They want the numbers to add together with out having to hit a submit button or have the page change. I have seen and been able to get two out of the four to add together but i can't get the rest. I am pretty new to JS so please be gentle. But any help is greatly appreciated. this is the code i have been trying to work with: [CODE] function calc(A,B,SUM) { var one = Number(A); if (isNaN(one)) { alert('Invalid entry: '+A); one=0; } var two = Number(document.getElementById(B).value); if (isNaN(two)) { alert('Invalid entry: '+B); two=0; } document.getElementById(SUM).value = one + two; } <input name="sum1" id="op1" value="" onChange="calc(this.value,'op2','result')" /> and another number: <input name="sum2" value="" id="op2" onChange="calc(this.value,'op1','result')" /> Their sum is: <input name="sum" value="" id="result" readonly style="border:0px;"> [CODE] Several posts here are almost what I need, but I can't put it all together.... thank you for your help, this is for a pet rescue charity! When selecting "mini" option, my form should should only allow typing in 6 out of 10 text input fields (the first 3 on the front, and the first 3 on the back too if its selected). Other sizes would allow typing in all 10. The NAME must be the same due to the shoppingcart used, but ID can be different. Also, if mini the maxlength of each should be 14, other sizes each maxlength is different. I will try to put the relevant code below, but one entire form is he http://wooftags.com/bone-iframe.html Code: <select name="product1[]">
<option value="mini">mini</option>
<option value="small">small</option>
<option value="medium">medium</option>
<option value="large">large</option>
</SELECT>
<input type="text" name="product1[]2" size="14" maxlength="14" style='text-transform: uppercase;' onblur="this.value=this.value.toUpperCase()" />
<br />
<input type="text" name="product1[]2" size="18" maxlength="18" style='text-transform: uppercase;' onblur="this.value=this.value.toUpperCase()" />
<br />
<input type="text" name="product1[]2" size="20" maxlength="20" style='text-transform: uppercase;' onblur="this.value=this.value.toUpperCase()" />
<br />
<input type="text" name="product1[]2" size="25" maxlength="25" style='text-transform: uppercase;' onblur="this.value=this.value.toUpperCase()" />
<br />
<input type="text" name="product1[]2" size="20" maxlength="20" style='text-transform: uppercase;' onblur="this.value=this.value.toUpperCase()" />
<INPUT TYPE="HIDDEN" NAME="price2" VALUE="1">
<input id="back1" type="text" name="product2[]2" size=14 maxlength=14 style='text-transform: uppercase;' onblur="this.value=this.value.toUpperCase()" disabled="disabled"/>
<br />
<input id="back2" type="text" name="product2[]2" size=18 maxlength=18 style='text-transform: uppercase;' onblur="this.value=this.value.toUpperCase()" disabled="disabled"/>
<br />
<input id="back3" type="text" name="product2[]2" size=20 maxlength=20 style='text-transform: uppercase;' onblur="this.value=this.value.toUpperCase()" disabled="disabled"/>
<br />
<input id="back4" type="text" name="product2[]2" size=25 maxlength=25 style='text-transform: uppercase;' onblur="this.value=this.value.toUpperCase()" disabled="disabled"/>
<br />
<input id="back5" type="text" name="product2[]2" size=20 maxlength=20 style='text-transform: uppercase;' onblur="this.value=this.value.toUpperCase()" disabled="disabled"/>
Hi to everyone, I'm kind of new to html/php/javascript but still I manage to create a nice looking form in wich the users have to fill some text fields and select items from drop list. But I now have a small problem. I need one of those text fields to be automaticly filled by the informations selected in 2 drop lists. This is how it would looks like : Machine-Name : __________ (empty text field) Drop-List1 : abc (the user selected the string "abc" from the list.) Machine-Name : abc- Drop-List 2 : zxy(the user selected the string "zxy" from the list.) Machine-Name : abc-zxy- I hope you understand what I mean. If needed, I can past those fields and list code, but I don't think that would be very useful since it is kind of trivial. So, in words, how would you guys proceed to achieve this goal? Hi. I need to fo a form and the content be sent to a database but i'm stuck... I knwo hot to do forms and also how to send data to mysql using php. But now i need something a bit more complex and i'm stuck. I need to make a form lets say with "parent name, age, child name, child age" Some people has 1 child some people has 2 3 4...and i need to have it separated and not just write like "joe, bob, jack" in the same line. How can i do this? And how should the database be structured? i can't put "id, parent, age, c_name, c_age" because some ppl will need to have more than 1 child in the database. Don't know what to do The page loads and existing data is put in their correct fields. When I click 'add more' to add more fields to the form it does so and I am able to add new data. If on adding a new fields and its data I click 'add more' again it clears out the recently added data from the fields. The existing data that was present when the page first loaded is still their but all the new fields added data is cleared. how can I get it so the data stays, like in phpmyadmin when adding new fields. JS Code: function addmore(addwhat) {
// count existing boxes to find out next number to use.
// ?
if (addwhat == 'addresses') {
fieldid = 'addressesdiv';
}
if (addwhat == 'namesnumbers') {
fieldid = 'namesdiv';
}
var dv = document.getElementById(fieldid).innerHTML;
var lines = dv.match(/<br>/ig).length;
if (addwhat == 'addresses') {
document.getElementById('addressesdiv').innerHTML += '<textarea name="address' + lines + '" cols="30" rows="2"></textarea><br>';
}
if (addwhat == 'namesnumbers') {
document.getElementById('namesdiv').innerHTML += '<textarea name="name' + lines + '" cols="30" rows="2"></textarea><br>';
document.getElementById('mobilesdiv').innerHTML += '<textarea name="mobile' + lines + '" cols="30" rows="2"></textarea><br>';
}
}
PHP Code: <?
if ($_POST['Submit'] == 'Submit') {
echo("sent<br>");
for ($c = 1; $c <= (count($_POST)-1)/2; $c++) {
echo("name" . $c . " = " . $_POST['name'.$c] ." mobile" . $c . " = " . $_POST['mobile'.$c] . "<br>");
}
}
$customer_id = "11";
// get existing data.
// if not yet sent get data from databases
$ok = "no";
if ($_POST['Submit'] != "Submit") {
echo("<br>not sent<br>");
$res = db_query("SELECT * FROM `customer_client_names` WHERE `customer_id` = '". $customer_id ."'");
$maincount = mysql_num_rows($res);
echo("<br>number of clients = ".$maincount."<br>");
for ($c = 1; $c <= $maincount; $c++) {
$_POST['name'.$c] = mysql_result($res, $c-1, "client_name");
$_POST['mobile'.$c] = mysql_result($res, $c-1, "client_mobile");
echo("cn = ".$_POST['name'.$c] . " cm = ".$_POST['mobile'.$c] . "<br>");
}
} else {
// display last posted info
echo("<br>sent<br>");
$ok = "yes";
// check if info was entrted correctly or not.
for ($c = 1; $c <= ((count($_POST)-1)/2); $c++) {
if ($_POST['name'.$c] != "" && $_POST['mobile'.$c] == "") {
echo("<br>" . $_POST['name'.$c] ." was not given a mobile number<br>");
$ok = "no";
$maincount ++;
}
if ($_POST['name'.$c] == "" && $_POST['mobile'.$c] != "") {
echo("<br>" . $_POST['mobile'.$c] ." mobile was not given a name<br>");
$ok = "no";
$maincount ++;
}
}
}
if ($ok == "no") {
?>
<form name="form1" method="post" action="?ac=<?=$menu_item;?><? echo("&phpsession=" . $phpsession); ?>">
<div style="width: 850px;">
<div id="namesdiv" style="float: left; padding-right: 10px;">Client's Names<br>
<? for ($c = 1; $c <= ((count($_POST)-1)/2)+1; $c++) {
if ($_POST['name'.$c] != "" || $_POST['mobile'.$c] != "") {
?>
<textarea name="<?='name'.$c;?>" cols="30" rows="2"><?=$_POST['name'.$c];?></textarea><br>
<?
}
} ?>
</div>
<div id="mobilesdiv" style="float: left;">Client's Mobile numbers<br>
<? for ($c = 1; $c <= ((count($_POST)-1)/2)+1; $c++) {
if ($_POST['name'.$c] != "" || $_POST['mobile'.$c] != "") {
?>
<textarea name="<?='mobile'.$c;?>" cols="30" rows="2"><?=$_POST['mobile'.$c];?></textarea><br>
<?
}
} ?>
</div>
</div>
<br style="clear: both;">
<a href="#" onClick="javascript:addmore('namesnumbers'); return false;" >Add more</a>
<input type="hidden" name="customer_id" value="<?=$customer_id;?>">
<input type="submit" name="Submit" value="Submit">
</form>
<?
}
?>
I type something on the current textarea/input and all the values get removed after I add another field. Is there a solution? Code: <script language="Javascript" type="text/javascript">
<!--
//Add more fields dynamically.
function addField(area,field,limit) {
if(!document.getElementById) return; //Prevent older browsers from getting any further.
var field_area = document.getElementById(area);
var all_inputs = field_area.getElementsByTagName("input"); //Get all the input fields in the given area.
//Find the count of the last element of the list. It will be in the format '<field><number>'. If the
// field given in the argument is 'friend_' the last id will be 'friend_4'.
var last_item = all_inputs.length - 1;
var last = all_inputs[last_item].id;
var count = Number(last.split("_")[1]) + 1;
//If the maximum number of elements have been reached, exit the function.
// If the given limit is lower than 0, infinite number of fields can be created.
if(count > limit && limit > 0) return;
//Older Method
field_area.innerHTML += "<li><textarea id='steps' name='steps[]' rows='5' cols='40'></textarea><br /><input id='steps_image' name='steps_image[]' /></li>";
}
//-->
</script>
<ol id="steps_area"><li>
<textarea id='steps' name='steps[]' rows='5' cols='40'></textarea><br /><input id='steps_image' name='steps_image[]' />
</li>
</ol>
<input type="button" value="Add" onclick="addField('steps_area','',15);"/>
I am working on a page where the user will select a location from a dynamically generated dropdown list. I was able to create the php multidimensional array (tested and working) from a MySql database using the users information at login, but I'm having problems converting it to a javascript multidimensional array. I need to be able to access variables that I can pass to a number of text fields within an html form. For instance, if a user belongs to a company with multiple addresses, I need to be able to let them select the address they need to prepopulate specific text fields. php array creation: Code: if ($row_locations)
{
while ($row_locations = mysql_fetch_assoc($locations))
{
$mail[$row_locations['comp_id']]=array('mailto'=>$row_locations['mailto'], 'madd'=>$row_locations['madd'], 'madd2'=>$row_locations['madd2'], 'mcity'=>$row_locations['mcity'], 'mstate'=>$row_locations['mstate'], 'mzip'=>$row_locations['mzip'], 'billto'=>$row_locations['billto'], 'badd'=>$row_locations['badd'], 'badd2'=>$row_locations['badd2'], 'bcity'=>$row_locations['bcity'], 'bstate'=>$row_locations['bstate'], 'bzip'=>$row_locations['bzip']);
}
}
javascript function - this should create the array and send variables to text fields. Code: function updateAddress() {
var mail = $.parseJSON(<?php print json_encode(json_encode($mail)); ?>);
{
if (comp_id in mail) {
document.getElementById('mailto').value=mail.comp_id.mailto.value;
document.getElementById('madd').value=mail.comp_id.madd.value;
document.getElementById('madd2').value=mail.comp_id.madd2.value;
document.getElementById('mcity').value=mail.comp_id.mcity.value;
document.getElementById('mstate').value=mail.comp_id.mstate.value;
document.getElementById('mzip').value=mail.comp_id.mzip.value;
} else {
document.getElementById('mailto').value='';
document.getElementById('madd').value='';
document.getElementById('madd2').value='';
document.getElementById('mcity').value='';
document.getElementById('mstate').value='';
document.getElementById('mzip').value='';
}
}
}
Where is this breaking? Thanks in advance. Hi I am doing validation on a form, but instead of throwing an alert on empty fields I want to highlight those fields indicating error. if all are empty, then i would like to show only 1 generalized error message "Pls. fill the highlighted textboxes.". how do i do this and thanks in advance. Referring to following link, I get no idea on what the highlight code do, I would like to retrieve the web page using direct URL coding without using function. Does anyone have any suggestions? Thanks in advance for any suggestions http://www.dailyfx.com.hk/calendar/index.html function setFilter(field, value){ var params = {}; params["type"] = "calendar"; params["date"] = "2011-12-06" $('#calTable').load("/inc/process.php", params, function(data){ $(this).html(gbBig5(data)); }); } Hi, I have say 12 pics on a page, in 3 rows of 4. The rows of pics are there so that a choice can be made from each row and I'm using a function <script> var highlight_color = '#FF0033'; function toggle_highlight(id) { var images = document.getElementsByTagName('img'); for (var i = 0; i < images.length; i++) { var image = images[i]; image.style.borderColor = image.id == id ? highlight_color : 'white'; } } </script> to toggle a border colour change so that you can see what was chosen from each row. The function I have used is fine in that it works, but I can only choose one picture and have the border changed, then if I click on another row the first border that changed obviously changes back and the new selection is highlighted. I don't really know where to go from here. Any help will be much appreciated. Thank you. Hey guys, So, I am using the highlight.js library to highlight posted code. It is working fine, however in IE it centers everything within my <pre><code>...</code></pre> area. This is because my body has the attribute: text-align: center; This is specifically because IE doesn't respond to: margin: 0 auto. So, how could I go about fixing this? Here is the code. Code: <html>
<head>
<link rel="stylesheet" href="highlight/styles/sunburst.css">
<script src="highlight/highlight.pack.js"></script>
<script>hljs.initHighlightingOnLoad();</script>
<style type="text/css">
pre
{
overflow: auto;
}
p hover
{
position: relative;
width: 100%;
height: 80%;
z-index: 99;
}
body
{
margin: 0px;
text-align: center;
}
.spacer1
{
height: 7%;
}
.sub_title
{
text-align: center;
font-size: 1.7em;
font-family: monospace;
font-weight: bold;
}
.sub_title2
{
text-align: center;
font-size: 1.4em;
font-family: monospace;
font-weight: bold;
}
.text_norm
{
font-size: 1.2em;
font-family: monospace;
text-align: left;
}
.code_cont
{
width: 90%;
height: 40%;
background-color: #CCCCCC;
border: 1px solid #333333;
margin: 0 auto;
overflow: auto;
text-align: left;
}
#container
{
background-color: #999999;
width: 80%;
height: auto;
margin: 0 auto;
overflow: hidden;
padding-bottom: 5%;
}
#title_cont
{
background-color: #333333;
width: 100%;
height: 10%;
display: table;
text-align: center;
}
#title
{
color: #ffffff;
font-size: 2.4em;
font-family: monospace;
font-weight: bold;
display: table-cell;
vertical-align: middle;
}
#summary_cont
{
width: 90%;
margin: 0 auto;
}
#ex_cont
{
width: 90%;
margin: 0 auto;
}
</style>
</head>
<body>
<div id="container">
<div id="title_cont">
<span id="title">Dynamically Expanding Textarea Script</span>
</div>
<div id="summary_cont">
<div class="sub_title">SCRIPT SUMMARY</div>
<br />
<div id="summary_body" class="text_norm">This script adds a feature on all textarea's in a page allowing them
to dynamically change height according to their content. The script goes at the very bottom of the body. The
script first makes an array of all the textareas on the page, and then modify's the onfocus, onblur</div>
</div>
<div class="spacer1"></div>
<div class="sub_title2">Code(Goes at bottom of <body>)</div>
<pre class="code_cont">
<code>
<script type="text/javascript">
////////////////////////////////////
// Auto Expand Textarea Script //
////////////////////////////////////
//This script gives every textarea//
//the property of expanding and //
//returning to original size //
//relative to its conetnt. //
////////////////////////////////////
// Insert at end of body tag //
////////////////////////////////////
//Sniffer is the variable holding the recursive setTimeout function
var sniffer;
//textareas is the array of every textarea element found on the page
var textareas = document.getElementsByTagName('textarea');
//If user is viewing through IE, set overflow to visible, everything
//else is already taken care of.
if (navigator.appName == 'Microsoft Internet Explorer')
{
for(var i=0; i %lt; textareas.length; i++)
{
textareas[i].style.overflow = "visible";
}
}
else
{
//This function dynamically changes the height of the textarea in focus
function tAreaSniffer(tArea, prevVal)
{
//This makes sure the textarea doesn't change height if no changes
//have been detected recently.
var curVal = tArea.value;
if(curVal != prevVal)
{
tArea.style.height = 1 + "px";
tArea.style.height = tArea.scrollHeight + "px";
}
//This is a recursive call that will execute 50 milliseconds after here.
sniffer = setTimeout(function(){tAreaSniffer(tArea, curVal)}, 50);
}
//This cycles through every textarea on the page and assigns different properties
//and methods as can be seen below. Onfocus property means when a textarea has
//focus, the script tAreaSniffer will run. When it loses focus the function will stop.
//Overflow hidden ensures that no scrollbar will be present, and minHeight is to make
//sure the textarea never gets smaller than its originally intentded height.
for(var i=0; i < textareas.length; i++)
{
textareas[i].onfocus = function(){tAreaSniffer(this, this.value);};
textareas[i].onblur = function(){clearTimeout(sniffer);};
textareas[i].style.overflow = "hidden";
textareas[i].style.minHeight = textareas[i].offsetHeight + "px";
}
}
</script>
</code>
</pre>
<div class="spacer1"></div>
<div id="ex_cont">
<div class="sub_title2">Example</div>
<div class="text_norm">Below are several textareas. This is meant to demonstrate the script's universal
power, in the sense that it will modify each and every textarea object. To test the script, simply type,
or copy and paste text into the textareas. They should change accordingly.</div>
<div>
<textarea cols="42" rows="6"></textarea>
<textarea cols="42" rows="6"></textarea>
<textarea cols="42" rows="6"></textarea>
<textarea cols="42" rows="6"></textarea>
</div>
</div>
</div>
<script type="text/javascript">
////////////////////////////////////
// Auto Expand Textarea Script //
////////////////////////////////////
//This script gives every textarea//
//the property of expanding and //
//returning to original size //
//relative to its conetnt. //
////////////////////////////////////
// Insert at end of body tag //
////////////////////////////////////
//Sniffer is the variable holding the recursive setTimeout function
var sniffer;
//textareas is the array of every textarea element found on the page
var textareas = document.getElementsByTagName('textarea');
//If user is viewing through IE, set overflow to visible, everything
//else is already taken care of.
if (navigator.appName == 'Microsoft Internet Explorer')
{
for(var i=0; i < textareas.length; i++)
{
textareas[i].style.overflow = "visible";
}
}
else
{
//This function dynamically changes the height of the textarea in focus
function tAreaSniffer(tArea, prevVal)
{
//This makes sure the textarea doesn't change height if no changes
//have been detected recently.
var curVal = tArea.value;
if(curVal != prevVal)
{
tArea.style.height = 1 + "px";
tArea.style.height = tArea.scrollHeight + "px";
}
//This is a recursive call that will execute 50 milliseconds after here.
sniffer = setTimeout(function(){tAreaSniffer(tArea, curVal)}, 50);
}
//This cycles through every textarea on the page and assigns different properties
//and methods as can be seen below. Onfocus property means when a textarea has
//focus, the script tAreaSniffer will run. When it loses focus the function will stop.
//Overflow hidden ensures that no scrollbar will be present, and minHeight is to make
//sure the textarea never gets smaller than its originally intentded height.
for(var i=0; i<textareas.length; i++)
{
textareas[i].onfocus = function(){tAreaSniffer(this, this.value);};
textareas[i].onblur = function(){clearTimeout(sniffer);};
textareas[i].style.overflow = "hidden";
textareas[i].style.minHeight = textareas[i].offsetHeight + "px";
}
}
</script>
</body>
</html>
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