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JavaScript - Update Selected Option Based On Another Entry
I have an options list that is generated from a database. It currently has ~125 options in it.
I've received the request that the user be able to either enter the corresponding number or select the option from the list. How can I update the "selected" attribute in the options list based on a number that may be entered in another text entry box? Similar TutorialsI'm taking a beginning javascript class and have been trying to figure out one last part of a homework assignment and am just not seeing how to work it out. Any help is greatly appreciated! What I'm having trouble with is doing the text verification. When a user selects an option from the select list they then need to type in the text area given. If the user doesn't type the word selected in the list then an error message should appear under the text area. If you look at my code you'll see that I have the text_check() function doing the verification. I can get it to work when there is only one option but once I add the other two it stops working. I've tried if... else and other variations, but can't seem to nail it down. Thanks! Code: function select_function()
{
var medical=document.getElementById("medical_list")
var selected_item=medical.selectedIndex
if (selected_item==0)
{
document.getElementById("enter_info").innerHTML="Enter Your" +"<span style='color:blue'>" +" Medication" + "</span>"+ " Information"
var comments=document.getElementById("comments");
comments.focus();
}
if (selected_item==1)
{
document.getElementById("enter_info").innerHTML="Enter Your" +"<span style='color:blue'>" +" Hospitalization" + "</span>"+ " Information"
var comments=document.getElementById("comments");
comments.focus();
}
if (selected_item==2)
{
document.getElementById("enter_info").innerHTML="Enter Your" +"<span style='color:blue'>" +" Physician" + "</span>"+ " Information"
var comments=document.getElementById("comments");
comments.focus();
}
}
function text_check()
{
var user_comments=document.getElementById("comments").value.toLowerCase();
var med_comment=user_comments.indexOf('medication');
var hosp_comment=user_comments.indexOf('hospitalization');
var phys_comment=user_comments.indexOf('physician');
mySelectList = document.getElementById("medical_list");
if (mySelectList.value='Medication' && med_comment==-1)
{
document.getElementById("word_error").innerHTML="You need to have the word,"+"<span style='color:red'>"+" Medication"+"</span>"+" somewhere in the text";
}
if (mySelectList.value='Hospitalization' && hosp_comment==-1)
{
document.getElementById("word_error").innerHTML="You need to have the word,"+"<span style='color:red'>"+" Hospitalization"+"</span>"+" somewhere in the text";
}
if (mySelectList.value= 'Physician' && phys_comment==-1)
{
document.getElementById("word_error").innerHTML="You need to have the word,"+"<span style='color:red'>"+" Physician"+"</span>"+" somewhere in the text";
}
}
function submit_alert()
{
alert("You submitted the form")
}
function clear_error()
{
document.getElementById("word_error").innerHTML="";
}
function changeDR()
{
var my_textarea=document.getElementById("comments");
var comment_string=my_textarea.value;
var doctor=comment_string.indexOf('Dr.');
var comment_string2='';
if (comment_string < 0)
{
comment_string2=comment_string
} else {
comment_string2=comment_string.replace('Dr.','Doctor')
}
my_textarea.value=comment_string2;
}
</script>
</head>
<body style="background-color: silver">
<h2>Medical History</h2>
Select Category: <br>
<select id="medical_list" onChange="select_function();">
<option>Medication</option>
<option>Hospitalization</option>
<option>Physician</option>
</select>
<br><br><br>
<div id="enter_info">Enter Your <font color="blue">Medication</font> Information:</div>
<br>
<form method="post" action="">
<textarea id="comments" cols="60" rows="15" onBlur="text_check();" onFocus="clear_error();" onkeyup="changeDR();">
</textarea><br>
<div id="word_error"></div><br>
<input type="submit" value="Submit Information" onClick="submit_alert();"/>
</form>
</body>
</html>
Hi, Is there anyone who could help me figure out how to Change a Hidden Fields Name based on selected option. The hidden fields name is sent off and I need to change the name depending on what option they select. For if they select MyList the hidden field name needs to be SelectLists[40] or if they select testlist the hidden field name needs to be SelectLists[41]. This is probably way, way off but I've done this and it doesn't work. Any help would be greatly appreciated, thanks. <script language="JavaScript"> function changelist() { //here we assign the value of the hidden input to x x=eval(document.getElementByName("SelectLists[40]"); if(document.getElementById("SelectLists[40]").selected=true x=SelectLists[40] else(document.getElementById("SelectLists[41]").selected=true x=SelectLists[41] else(document.getElementById("SelectLists[42]").selected=true x=SelectLists[42] //now we assign the new value to the input document.getElementById("theHiddenInput").name=x; //and now we test alert(document.getElementById("theHiddenInput").name) } </script> <input type="hidden" id="theHiddenInput" name="SelectLists[40]" value="Yes"> <select class="inpBox" style="width: 287px" name='mailinglist' id="lists" onchange="changelist()"> <option value="SelectLists[40]" name="SelectLists[40]" id="SelectLists[40]">MyList</option> <option value="SelectLists[41]" name="SelectLists[41]" id="SelectLists[41]">testlist</option> <option value="SelectLists[42]" name="SelectLists[42]" id="SelectLists[42]">testlist2</option> I have a select box with a few options. When the page loads I need to get the selected option in this select box and alert its inner text. Yet everything I try out on the net that should work wont work in IE, all other browser its fine. Please can someone show me the TRUE and correct way to get the inner text of a option from a select box in IE? Thanks! Hello everybody, I have a javascript adding new options to a drop down select menu getting the information from the database. The code is as written below: Code: function setOptions1() {
var selbox2 = document.egitimgiris.alttipID;
selbox2.options.length = 0;
selbox2.options[selbox2.options.length] = new Option('Option1','22')
selbox2.options[selbox2.options.length] = new Option('Option2','23')
selbox2.options[selbox2.options.length] = new Option('Option3','24')
selbox2.options[selbox2.options.length] = new Option('Option4','25')
}
I want one of them to be added as selected. I will put an "if" check and if it the value of the option and the value in the database is equal I want that option to be added as "selected". Is this possible? If yes, how? Please help. Thanks and regards telmessos I couldn't think of a way to explain my idea thoroughly, but I'm learning javascript and I have an html <select> form selected by using getElementById. Now, how do I access the data within the option tags to write to a variable? I know there are many simple ways of making it so that the value of the options are the html color name rather than hex code, but I'm doing this to learn javascript. I have experience with ruby (ok, not THAT much, but I understand the concepts). Anyway's the code explains my problem much better, so here it is: Code: <body>
<form action= "">
<fieldset>
<select id="selColor">
<option value="FFFFFF">White</option>
<option value="#A9A9A9">Gray</option>
<option value="#000000">Black</option>
<option value="#FF0000">Red</option>
<option value="#FFA500">Orange</option>
<option value="FFFF00">Yellow</option>
<option value="#9ACD32">Green</option>
<option value="#0000FF">Blue</option>
<option value="#4B0082">Indigo</option>
<option value="#9400D3">Violet</option>
</select>
<input type="button"
value="Change Color"
onclick="changeColor()" />
</fieldset>
</form>
<script type="text/javascript">
//<![CDATA[
function changeColor() {
var selColor = document.getElementById("selColor")
var color = selColor.value
var colorid =
if (confirm("would you like to change color to "+colorid+"?")) {
document.body.style.backgroundColor = color
}
}
//]]>
</script>
</body>
I haven't initialized var colorid, but I'm trying to set it to either of the highlighted parts of the following piece of my code. <option id=" white " value="FFFFFF"> White </option> I want to access that part of the option tags of the element that the user selects. So, without changing the hex values to the color equivalent, how do I access the name of the selected option tag? ( I could make an if/switch statement to translate the hex color into a name and put it into the variable, but I would like to know how to do what I'm asking in case I run into a similair problem.) I have a dropdown box with 2 options: Free or Upgraded I need to do 2 separate things depending on which one is chosen. If Free, then set the value in fourth text field to 9999 else, set value in Fourth field to 5555. Code: <head>
<script type="text/javascript">
function calculate()
{
var myLevel = eval(document.earningsform.level.value)
var memberType = eval(document.earningsform.type.value)
if(memberType==free){
document.earningsform.fourth.value = 9999;
}
else{
document.earningsform.fourth.value = 5555;
}
</script>
</head>
<body>
<table>
<form action="calculator.php" method="POST" name="earningsform">
<tr>
<td align="center">My Level: </td><td><input type="text" name="level" value="50" size="10"></td><td></td>
</tr>
<tr>
<td align="center">Member Type: </td><td>
<select name="type">
<option value="upgraded" name="upgraded" selected="selected">Upgraded</option>
<option value="free" name="free">Free</option>
</select></td>
<td></td>
</tr>
<tr>
<td align="center">4th Level: </td><td><input type="text" name="fourth" size="10" value="5"></td><td>7.5</td>
</tr>
</form>
</table>
</body>
I have a simple form with an options drop down box: Code: <form method="POST" name="form"> <select autocomplete="off" id="input" name="input" onchange="this.form.submit();goHere();"> <option>Choose...</option> <option>Question1</option> <option>Question2</option> <option>Question3</option> </select> I wish to identify the option chosen in the function but not by its value, by its position: Code: <script>
function goHere(){
var s = document.getElementById("input");
if (s.selectedIndex == -1) return;
var u = s.form.elements[i];
alert(u);
</script>
I was hoping that variable "u" would be either 0, 1, 2, or 3. How can I get a variable to alert me the position of the selected option in the form? I think it is elements[i]. Hi, I'm new to JavaScript. I'm trying to create my form in such a way that if 'Premium' is selected, a the text box with label 'membership no' is displayed and if 'bronze' is select, the drop-down list 'sponsor' is displayed instead....here's what my form looks like... PHP Code: <form id="form1" name="form1" method="post" action=""> <p> <label for="select">Membership:</label> <br /> <select name="select" id="select"> <option value="Premium" selected="selected">premium</option> <option value="Bronze">bronze</option> </select> </p> <p>Membership No:<br /> <input type="text" name="textfield" id="textfield" /> </p> OR<br /> Sponsor: <br /> <select name="select2" id="select2"> <option value="329">329</option> <option value="234">234</option> </select> </form> appreciate the help Hi, I am using following code-- Code: <td>
<centre>
<select id=\"extenddays\" size=\"1\" name=\"extenddays\">
<option value\=\"2\"> 2 </option>
<option value\=\"4\"> 4 </option>
<option value\=\"7\"> 7 </option>
</select>
<a href=?ext_days=\"extendform.extenddays.value\" & ?extfid=" . $data->{'fid'} ." \" >
<INPUT TYPE=\"SUBMIT\" NAME=\"extend\" VALUE=\"extend\" />
</a>
</centre>
</td>
Here, I want that when I click on 'extend' button, it should redirect to the url given in the href.. But while forming url run time , it is not retrieving the value of "extenddays" ( which is selected option value).. Please help. Cheers, Shashikant Shinde Greetings, I am trying to make a form that collects "Number of Children" a parent has. If they select "4" from the select input, then I want to slidetoggle out the appropriate divs, one for each child. Code: <select id="NumberofChildren" name="NumberofChildren">
<option value="0">0</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
</select>
The div IDs to display are 1child, 2child, 3child, 4child, 5child. I have been able to use slidetoggle in the past when attached to a button, but this one has me lost. Anyone know how to accomplish this? Your help is greatly appreciated! Thank you! ive been racking my brain looking for a code solution for this....im a html and css pro....and a javascript NOOB lol heres what im tryna do....i have a form...that has a Code: <option> in it for 6 dropdown options.... in one of those possible options.. when SELECTED...i want the div layer that i currently have under it...to appear and i cant seem to figure it out....heres my code in its entirety i want budget div...to appear when the option website design is selected Code: <label for="subject">What are you interested in?<em>•</em></label>
<select type="text" value="Choose a Service" name="subject" id="subject" />
<option selected> -- Select A Design Service --</option>
<option id="website"> Website Design </option>
<option> Twitter </option>
<option> Ning or Tumblr </option>
<option> Flyers </option>
<option> Business Card or Brochure</option>
<option>Other</option>
</select><br />
<div id="budget" style="display:none;"><label> Do you know your budget for this Project? </label> <input style="width:auto" type="radio" name="message" value="Not Sure"> Not sure
<input style="width:auto;margin-left:10px;" type="radio" name="budget" value="$400-$800"> $400-$800
<input style="width:auto;margin-left:10px;" type="radio" name="budget" value="$800-$1200"> $800-$1200
<input style="width:auto;margin-left:10px;" type="radio" name="budget" value="over $1200"> over $1200
</div>
I've inherited this piece and now I'm suppose to add to it. Its basic function currently is when the "Other" option is selected, a hidden text field shows. Now, I need to add when "Athletics" is selected, another hidden select group will show. I've set up the new Select group already, but not sure how to incorporate it into the already existing script. I've been researching for two days, and hopefully this form will be helpful. Code: <select id="Program" name="Program" size="1" onchange="
$other = document.getElementById('other_program').style;
$invoice = document.getElementById('invoice');
if (selectedIndex==6) {
$other.visibility='visible';
if ($invoice.value == 'General Fund') $invoice.value='';
} else {
$other.visibility='hidden';
if (selectedIndex==1) {
$invoice.value='Renegade Fund';
} else {
$invoice.value='Please Specify';
}
}
">
<option selected="selected" value="Not Selected"> - - Select One - - </option>
<option value="Athletics">Athletics</option>
<option value="Drum Line">Drum Line</option>
<option value="Renegade Fund">Renegade Fund</option>
<option value="General Scholarships">General Scholarships</option>
<option value="President's Circle">President's Circle</option>
<option value="Other">Other</option>
</select>
<span id="other_program"><input type="text" id="invoice" name="invoice" size="15" /></span>
<!-- the following is the new select group ive set up
<span id="alumni">
<select id="select-alumni" name="select-alumni" size="1">
<option selected="selected" value="Not Selected">Yes or No</option>
<option value="Yes-alumni">Yes</option>
<option value="Not-alumni">No</option>
</select>
</span>
-->
i'm working with a city select option, a hotel select option & an iframe. the hotel select option is populated depending on the chosen city which then updates the iframe src. this is all working fine. the trouble im having is that when the page is refreshed, normal f5 way, the hotel option changes whereas the city option & the iframe src remains the same?? this problem does not occur on a force refresh via control + f5 as then both select options & iframe src revert to their original state. I don't want the city option to change upon a normal page refresh. how do I go about this? below are the city, hotel select options & iframe Code: <form name="hotelslist" id="hotelslist">
<select id="cities" name="cities" onChange="hotel_list(hotelslist.cities.selectedIndex);loadHotel();">
<option value="Baddeck">Baddeck</option>
<option value="Banff">Banff</option>
</select>
<select id="hotelnames" name="hotelnames" onChange="loadHotel();">
<option value="Inverary Resort, Baddeck">Inverary Resort, Baddeck</option>
</select>
</form>
<iframe name="hotelframe" id="hotelframe" src="http://www.google.com" scrolling="no" width="660" height="1000" marginwidth="0" marginheight="0" hspace="0" vspace="0" frameborder="0"> <p>Your browser does not support iframes.</p> </iframe>
below is my javascript functions Code: function loadHotel() {
var destURL = document.hotelslist.hotelnames.options[document.hotelslist.hotelnames.selectedIndex].value;
window.frames["hotelframe"].location = destURL; }
var i;
function hotel_list(i){
var hotelslist = document.getElementById("hotelslist");
hotelslist.hotelnames.options.length=0;
switch(i)
{
case 0: //Baddeck
hotelslist.hotelnames.options[0] =new Option('Inverary Resort, Baddeck','http://www.test0.com');
break;
case 1: //Banff
hotelslist.hotelnames.options[0] =new Option('Banff Caribou Lodge & Spa','http://www.test1.com');
hotelslist.hotelnames.options[1] =new Option('Banff Ptarmigan Inn','http://www.test2.com');
hotelslist.hotelnames.options[2] =new Option('Banff Rocky Mountain Resort','http://www.test3.com');
hotelslist.hotelnames.options[3] =new Option('The Rimrock Resort','http://www.test4.com');
hotelslist.hotelnames.options[4] =new Option('Fairmont Banff Springs','http://www.test5.com/');
break;
}
}
can some one please advise on a cross browser solution? thanks in advance. Omar. Hi Guys, Im in need of some help with regards to forms. I am looking to build as basic as possible, a form that has 3 select dropdowns that have predetermined options. The user will select the first option and based on that option the second will populate and based on that, the third one will give the last option. Now, when the last one is selected, i need a div or a paragraph displaying information to be displayed. So here's the framework. Option 1 = fruit or vegitables of which fruit is selected is selected by the user Option 2 = Apples, Grapes, and pears of which apples is then selected Option 3 = Red, Green and Yellow of which Green is selected. Once green is selected, I need a description about the green aple to be displayed. Can anyone help me out on this? I am not sure where to begin and my boss is adament it must be done like yesterday. Ay help will be appreciated. Thanks. I have a form which contains a few drop down lists. The contents of the dropdown lists are dependent on each other and are populated via php scripts which are called each time a selection is made or changed by the user. When the view results button is clicked in the form I need the user to be directed to a specific page based on the selections they have made. The url of the page they need to be directed to is really based on what has been chosen in the first dropdown. The subsequent dropdowns form variables that I need to be sent to the page so that the data the user sees on that page is relevant. ie if the user has chosen bikes then a specific manufacturer then a specific price range the page they will be sent to will be the bike.php page with all the manufacturer specific bikes in their chosen price range visible. Can anyone tell me the best way to go about doing this please? I had thought about using the php header script along with an if statement but how do I then go about getting the variables sent to the page to be recognised? Would I be better looking at the window.location in js to do this? Any help and advice would be greatly appreciated on this. I can post the code for the form if that makes any difference. Hello, I am hoping someone can help me with following search form. As you can see I have created a form but I don't know how to fix the coding so when a user select a category it will add a different hidden filed for that option for example: When the user selects category "Men" the hidden filed Code: <INPUT TYPE="HIDDEN" NAME="REFERRER" VALUE="http://men.com/acatalog/"> will be added and when the user selects category "Kids" the hidden filed Code: <INPUT TYPE="HIDDEN" NAME="REFERRER" VALUE="http://kids.com/acatalog/"> will be added and so on... Here is my form coding I am using: Code: <form name="simplesearch" method="get" action="" onsubmit="ssite=document.getElementById('sitelist');this.action=ssite.options[ssite.selectedIndex].value;return true;">
<input type="hidden" name="page" value="search" />
<input type="hidden" name="PR" value="-1" />
<input type="hidden" name="TB" value="A" />
<input type="hidden" name="NOLOGIN" value="1" /><input align="top" class="main_search_box" name="SS" type="text" value="search for ..." onfocus="this.value='';">
Search within:
<select id="sitelist">
<option value="">Select Catagory</option>
<option value="http://kids.com/cgi-bin/ss000001.pl">kids</option>
<option value="http://men.com/cgi-bin/ss000001.pl">men</option>
<option value="http://women.com/cgi-bin/ss000001.pl">women</option>
</select><input type="submit" class="button" name="ACTION" value="Go!">
</form>
Also I have one more question how do I make the "Select Catagory" a Must Choose and if not chosen to give message that say"Please Select a Category" Thank you in advance for any help you can give me... I am a bigginer so please go easy on me I am trying to get the variable extraCharge to increment by $1 for every topping over the 3 included toppings. How can this be done? For statements confuse me 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=utf-8" />
<title>Checkbox Toppings</title>
<script type="text/javascript">
function validate(form)
{
var toppingsArray = document.form1.scripts.length;
var extraCharge = 0;
// Checking if at least one period button is selected. Or not.
if (!document.form1.orderType[0].checked && !document.form1.orderType[1].checked)
{
alert("Please Select orderType");
return false;
}
var total=""
for(var i=0; i < document.form1.scripts.length; i++)
{
if(extraCharge >= 3)
alert("You can only select 2");
else if(document.form1.scripts[i].checked)
total +=document.form1.scripts[i].value + "\n"
}
for(var i=3; i >= document.form1.scripts.length; i++)
{
var extraCharge = extraCharge + 1;
}
if(total=="")
alert("select Toppings")
else
document.form2.checklist.value=(total);
document.form2.toppingCharge.value=(extraCharge);
return false;
}
</script>
</head>
<body>
<h2>3 Toppings included, $1 for each additional topping</h2>
<table width="333" border="0">
<tr>
<td width="179"><form name="form1" method="post" action="" onchange="return validate(this)">
Select Order Type First:<br />
<input name="orderType" value="delivery" type="radio">delivery </font>
<br />
<input name="orderType" value="takeOut" type="radio"><font face="verdana" size="2">takeOut</order></b>
<br />
<br />
<br />
<input name="scripts" value="extracheese" type="checkbox">Extra Cheese
<br />
<input name="scripts" value="sausage" type="checkbox">Sausage
<br />
<input name="scripts" value="peperoni" type="checkbox">Peperoni </font>
<br />
<input name="scripts" value="bacon" type="checkbox">Bacon
<br />
<input name="scripts" value="canadianBacon" type="checkbox">Canadian Bacon
<br />
<input name="scripts" value="mushroom" type="checkbox">Mushroom </font>
<br />
<input name="scripts" value="pineapple" type="checkbox">Pineapple </font>
<br />
<input name="scripts" value="onion" type="checkbox">Onion
<br />
<input name="scripts" value="olive" type="checkbox">Olive
<br />
<input name="scripts" value="greenPepper" type="checkbox">Green Pepper </font>
</form>
</td>
<td width="144">Selected Toppings:
<br />
<form name="form2"><textarea name="checklist" cols="20" rows="15" value="total"></textarea>
Extra Topping Charge:
<input name="toppingCharge" type="text" />
</form></td>
</tr>
</table>
</body>
</html>
hi, all... haven't found exactly the solution here, and trying to cobble something together but it's just not working. php is doing the heavy lifting in terms of generating the code, but the upshoot is i have a script: Code: <script type="text/javascript">
var values[1] = "This layout includes a 'title' and 'body' content block.";
var values[2] = "This layout features everything included in the Standard Page layout as well as a 'comments' block.";
function replaceText( var_id) {
document.getElementByID(pageLayout_replace).innerHTML = values[var_id];
}
</script>
and a select box: Code: <fieldset> <legend>Page Layouts</legend> <label for="pageLayout" class="half left">Choose a page layout<br /> <select name="pageLayout" id="pageLayout" size="5" onChange="replaceText(this.options[this.selectedIndex]);"> <option value="1">Standard Page</option> <option value="2">Standard Page w/Comments</option> </select> </label> <label class="half right"> Page Layout Description:<br /> <span id="pageLayout_replace">Click on a page layout title to the left to get a description here.</span> </label> </fieldset> however, the error console in firefox says Code: Error: missing ; before statement
Line: 14, Column: 8
Source Code:
var values[1] = "This layout includes a 'title' and 'body' content block.";
and then when i try to select one of the items, Code: Error: replaceText is not defined Line: 1 any insight? thanks in advance! I have a radio button that asks Does your URL exist or need to be purchased? and a drop down menu that lists different types of web projects (i.e. new website and website redesign). What I'm trying to achieve is, if the user selects that the URL exists, I would like the drop down menu option new website to be removed from the list. Form: Code: <form> <input type="radio" name="website_status" value="exists"/> Exists <input type="radio" name="website_status" value="purchase_required"/> Needs to be purchased <select name="projects"> <option></option> <option value="new_website">New Website</option> <option value="website_redesign">Website Redesign</option> </select> </form> JavaScript: [CODE] <script> window.onload = initForms; function initForms() { for (var i=0; i<document.forms.length; i++) { document.forms[i].onsubmit = function() {return validForm();} } } function validForm() { var inputarray = document.getElementsByTagName("input"); var selectarray = document.getElementsByTagName("select"); var textarea = document.getElementsByTagName("textarea"); if (inputarray[0].checked == true) { selectarray[0].remove(options[1]); return false; } </script> I've been experimenting with this for the last couple hours and am getting nothing! Could someone please point me in the right direction? |
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