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JavaScript - Simple String Question
I want to Count the number of occurrences of character 't' in a string entered by the user (via prompt) and write the result to the web page. For example, if the user enters "Working with strings", you should write a message saying that the string contains 't' 2 times.
I know it has something to do with charAt. Im just playing around with it trying to figure it out and got Code: var str = prompt(); document.write(str.charAt(1)); That doesnt count anything up obviously. i need to use a loop but im not sure how to apply a loop and charAt. Similar TutorialsHello, I need your help. Let's say for example if I have the following file number: 2011-1234567 and if the value of the variable is already the same (ie. var fileNo = 2011-1234567) how can I go about automatically adding a number at the end? ex.1.) var fileNo = "2011-1234567" if (fileNo already exists) { fileNo = 2011-1234567-2 } ex.2.) var fileNo = "2011-1234567-2" if (fileNo already exists) { fileNo = 2011-1234567-3 } ect. Much thanks and appreciation for all your help. Jay Hello, I need your help. How could I write a functional if statement such that it would check against a series of various word strings seperated by commas ie. function check(y) { //y = "FOR INPUT" var string_to_check = FOR INPUT, FOR ACTION, FOR APPROVAL if (y isin string_to_check) { return 1 } } Thanks for everyones help. J Hello, I need your help. For one reason or another, I have a textarea with text in it, however, when I call it back and store it in var, it seems to strip all the spaces. [ID = "COMMENTS"] Ie. of what's in the textarea: ---------------------------------------------- Apples are red Oranges are orange Pears are green Bananas are yellow var comments = document.getElementById("comments").value returns: Apples are red Oranges are orange Pears are green Bananas are yellow How could this be re-written such that the spaces in between the text aren't ignored? Much thanks and appreciation for everyones help. Cheers J I have a Number as a String. It goes from 1 to 999 but I need to set the format so that it has leading Zeros. So 1 is 001 and 2 is 002 and 99 is 099. Is there a way to do this in JavaScript? Thanks, ~Dave Hi, I'm fairly new to javascript as well as brand new to these forums. I have a question that I'm sure has a simple answer but I either can't get my head around it or I'm just too unfamiliar with string methods. I'm trying to replace all instances of "&" with its alt code "&" in a string. Below is my code.. Code: Match = subText.indexOf("&");
while (Match != -1)
{
subText = subText.replace( "&", "&" )
Match = subText.indexOf("&");
}
The problem here is that an ampersand will always exist in the string if there was one originally and I get an infinite loop. Would anyone know of a way around this? Thank you. Hello, How would I seperate a text string such that it would appear on seperate lines ie. Initial Input: ------------------------------------------- StrMsg = "This is an example of a string that will appear on seperate lines" "Hoping that this fully works, there will be no errors and all will be well" "Thank you to the experts and pros on this forum who are here to help" "This is the last line of text." Expected Outcome: ------------------------------------------- This is an example of a string that will appear on seperate lines Hoping that this fully works, there will be no errors and all will be well Thank you to the experts and pros on this forum who are here to help This is the last line of text. Much thanks and appreciation for all your help J Function findsometing() ( var myString = 'results' + '<BR>' for (var initiator, test condition,incrementor.) { if (.....) { myString ='some quote'; } else if (.....) { myString += something + '<br>' } else if (....... ) { myString += something + '<br>' } else { myString += ''; } } displayMessage(myString) ) I am a complete newbie to javascript and programming, so excuse any faux pas, but I want to check the myString variable after all the loops in the for loop statement have been completed. For example if nothing was added to the var myString after the completeion of the for loop, i want to display a message that no results found. i tried various attempts of an if statement along lines of } } if (myString = 'results') ....i also tried if myString= ('results' + '<BR>') { displayMessage('no results found') } else { displayMessage(myString) } ) Any pointers as to where i am going wrong? I am using a show/hide script for my sites FAQs. This is the code: However, when you click on one of the Questions it brings you to the top of the page due to the <a href="#" How do I make it so it doesn't bring you to the top of the page? Code: <html>
<head>
<title>TEST TEMPLATE</title>
<script type="text/javascript">
function showHide(id)
{
var current = document.getElementById(id);
for ( var f = 1; f < 99999; ++f )
{
var div = document.getElementById("FAQ" + f);
if ( div == null ) return; // quit when we run out of FAQs
if ( div != current )
{
div.style.display = "none"; // zap all others
} else {
// toggle current one
div.style.display = ( div.style.display == "none") ? "block" : "none";
}
}
return false; // IMPORTANT!
}
</script>
</head>
<body>
<!------ QUESTIONS ------>
<p>Change lines <li> to divs or whatever</p>
<li> <a href="#" onclick="return showHide('FAQ1')">FAQ one</a></li>
<li> <a href="#" onclick="return showHide('FAQ2')">FAQ two</a></li>
<li> <a href="#" onclick="return showHide('FAQ3')">FAQ three</a></li>
<!------ ANSWERS ------>
<div id="FAQ1" style="display:none;"><p>Ans one</p></div>
<div id="FAQ2" style="display:none;"><p>Ans two</p></div>
<div id="FAQ3" style="display:none;"><p>Ans three etc etc.</p></div>
</body>
</html>
Hello, I am new to javascript. Below is the code that opens a new window when the user clicks on the button "Click here to see". But the code resides outside the <script></script>. As far as i know javascript codes have to be between these tags to work. How will the "window.open" statement work? Code: <form>
<input type="button" value="Click here to see" onclick="window.open('http://www.yahoo.com')" />
</form>
Hello guys, Im new to Javascript,please help me ya in my php code, I retrieve a ID value and assign to variable like below PHP Code: $id = $gettingdata['id']; and I want this id to be include together with javascript "insertsubcat" function like below Code: <a href="javascript:insertsubcat('.$ID.');"/>Click to insert this data</a>
in the javascript page, I dont know how to call back the id value and i try like code below but it doesnt work Code: function insertsubcat(data) {
var data = data.value;
.
.
.
.
}
Any idea? Thanks Azhan Malaysia I'm trying to not allow my users to enter in n/a in my form ex... "N/A" "n/A" "na" My code trips the alert every time no matter what is entered in the cell... Why is it doing that? Code: function appliance() {
if (document.ComplianceForm.Appliance.value=="n/a" || "N/A" || "n/A" || "N/a") {
alert("You cannot enter any variation of n/a in this cell.")
}
else {
return false;
};
}
Code: if(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(emailvalue))
this is a code to validate an email address. My question is.. how do you call this type of validation? Those /^\w+([\.-]?\w+.. i don't really understand how they work. Is there a special term used to describe this? I want to learn how it works. I want to search for tutorials online but i cant think of any desriptive word to use as keyword for google search. I cant find helpful results. Please help. Thanks I have an alert I'm using over in Salesforce to remind sales reps to use a special terms document when quoting. Problem is, the alert is going off for ALL accounts, not just "Account1" and "Account2". Is this line incorrect in syntax or something? if ((isstatus == "Proposal/Price Quote") && (acct == "Account1", "Account2")) Thanks all. This forum has been very helpful for me in the past so this was my first stop! Jeremy Code: <html>
<head>
<script type="text/javascript" language="javascript" src="/js/functions.js"></script>
<script type="text/javascript" src="/soap/ajax/10.0/connection.js"></script>
<script type="text/javascript">
function throwalert()
{
var isstatus = "{!Opportunity.StageName}";
var acct = "{!Opportunity.Account}"
var msgg = "Please remember to use a special terms and conditions quote template when quoting this opportunity.";
if ((isstatus == "Proposal/Price Quote") && (acct == "Account1", "Account2"))
{
alert(msgg);
}
else
{
window.parent.location.replace = "{URLFOR($Action.Opportunity.View, Opportunity.Id,null,true)};"
}
}
</script>
</head>
<body onload="throwalert()";>
</body>
</html>
I have the following code: Code: if (n==1 && g <=5)
{
sndPlayer1.URL ="Boy-a1.wav";
}
else if (n==1 && g >5)
{
sndPlayer1.URL ="Girl-a1.wav";
}
else if (n==2 && g <=5)
{
sndPlayer1.URL ="Boy-e1.wav";
}
else if (n==2 && g >5)
{
sndPlayer1.URL ="Girl-e1.wav";
}
else if (n==3 && g <=5)
{
sndPlayer1.URL ="Boy-i1.wav";
}
else if (n==3 && g >5)
{
sndPlayer1.URL ="Girl-i1.wav";
}
else if (n==4 && g <=5)
{
sndPlayer1.URL ="Boy-o1.wav";
}
else if (n==4 && g >5)
{
sndPlayer1.URL ="Girl-o1.wav";
}
else if (n==5 && g <=5)
{
sndPlayer1.URL ="Boy-u1.wav";
}
else if (n==5 && g >5)
{
sndPlayer1.URL ="Girl-u1.wav";
}
else if (n==6 && g <=5)
{
sndPlayer1.URL ="Boy-b1.wav";
}
else if (n==6 && g >5)
{
sndPlayer1.URL ="Girl-b1.wav";
}
else if (n==7 && g <=5)
{
sndPlayer1.URL ="Boy-b1.wav";
}
else if (n==7 && g >5)
{
sndPlayer1.URL ="Girl-b1.wav";
}
else if (n==8 && g <=5)
{
sndPlayer1.URL ="Boy-h1.wav";
}
else if (n==8 && g >5)
{
sndPlayer1.URL ="Girl-h1.wav";
}
else if (n==9 && g <=5)
{
sndPlayer1.URL ="Boy-t1.wav";
}
else if (n==9 && g >5)
{
sndPlayer1.URL ="Girl-t1.wav";
}
I was wondering what the best way to make a smaller simpler version of this code is? Would it be using a loop? If so can you help me with how to I have yet to have my ah-ha moment with Javascript but I think its coming soon. there are small things that seem to be baffling me and Im hoping posting to the forums to get help from people of limitless wisdom. What exactly does the "|" mean in this code? or I should say what does it do? Code: document.template.Aprod_string.value = document.template.Aprod_string.value + "|" + string_recode(Aprod_array) ; Hi everyone, I am a newbie Javascript programmer. I have gotten better lately and am starting creating scripts from scratch to test my knowledge. I wrote the script below and needless to say, it does not work... yet. I know I am not far and I need someone's help to tweak my script and let me know what was wrong with. That would be greatly appreciated. Anyone? I have this div in the middle of a page which has an image. I want the image.src to switch to the next image every 3 seconds. Here's my html code: Code: <body> <div id="slideShow"> <img src="pic3.jpg" id="image" /> </div> </body> Here's my js code: Code: window.onload = initLoad;
function initLoad()
{
// Create a new image object
oImage = new Image;
// tie the object image object with your target id in your html code
oImage = document.getElementById("image");
//Create a new date object
var oCurrDate = new Date();
// Create a new time object
var oCurrentTime = oCurrDate.getSeconds();
//Loop through all images in the document
for(var i=0; i<document.images.length; i++)
{
//the current image remains so as long as 3 seconds or less have passed
while(oCurrentTime <= oCurrentTime + 3)
{
// if 3 seconds have not passed, your current picture remains on the screen
oImage.src = document.images[i].src;
}
}
}
Can someone please tell me why there is an error with my code (see in red below). I am told that 'process' is not an object or is null and I don't understand why or the implications with the click event which I am trying to capture and pass to my function: Javascript Code: Code: var USStates = new Array(50);
USStates[0] = "Alabama";
USStates[1] = "Alaska";
USStates[2] = "Arizona";
USStates[3] = "Arkansas";
USStates[4] = "California";
USStates[5] = "Colorado";
USStates[6] = "Connecticut";
USStates[7] = "Delaware";
USStates[8] = "Florida";
USStates[9] = "Georgia";
USStates[10] = "Hawaii";
USStates[11] = "Idaho";
USStates[12] = "Illinois";
USStates[13] = "Indiana";
USStates[14] = "Iowa";
...
var stateEntered = new Array(50);
stateEntered[0] = "1819";
stateEntered[1] = "1959";
stateEntered[2] = "1912";
stateEntered[3] = "1836";
stateEntered[4] = "1850";
stateEntered[5] = "1876";
stateEntered[6] = "1788";
stateEntered[7] = "1787";
stateEntered[8] = "1845";
stateEntered[9] = "1788";
...
var process = document.getElementById("search");
process.onclick = getStateDate;
function getStateDate()
{
var selectedState = document.getElementById("entry").value;
for (var i = 0; i < USStates.length; i++)
{
if (USStates[i] == selectedState)
{
break;
}
}
if (i < USStates.length)
{
alert(selectedState + " entered the Union in " + stateEntered[i] + ".");
} else
{
alert("Sorry, '" + selectedState + "' isn't a US State.");
}
}
HTML Code ( in case you need it): 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>Loops</title> <script type="text/javascript" src="loops.js"></script> </head> <body> <h2>Enter a US Sate in the field below and click the 'submit' button to get the date of entry in the union</h2> <form action="process.php"> <input type="text" id="entry" name="entry" /> <input type="button" id="search" name="search" value="submit" /> </form> </body> </html> Ok...this is gonna sound very stupid to you guys, but I don't get one part of this code. Code: function range(upto) {
var result = [];
for (var i = 0; i <= upto; i++)
result[i] = i;
return result;
}
show(range(4));
What does result[i]=i mean? I know it adds the value of i into the array, but how? Why couldn't you just write it as result[i] or result[] = i? I'm building a webpage using javascript and iframes. Basically I have an iframe in the middle of the index.html page that links to another html page (let's call it iframe.html). My question is, is it possible to call a javascript function from iframe.html to control an object on index.html? If so, how do I do this? I'd like to be able to assign an image in iframe.html with the hyperlink of href="javascript:function()", where the function effects the CSS of a div on index.html. Thanks Hi there, a website I am trying to load in an Iframe uses this code to ensure that its window is the top window: Code: <script language="JavaScript"> if (window != top) top.location.href = location.href; </script> I was wondering is there any way possible of loading this page in an iframe or is this method of ensuring the page is on top not beatable? Many thanks, David. |
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