JavaScript - Sentinel Controlled Loop.

it wont loop, as long as you enter something in the name field it will submit. also how do i stop from submitting if all fields are not filled out? any help will be appreciated)
======
function checkForm(form)
{
var len = form.elements.length;
var h=0;
for (h=0; h<=len; h++){
if ((form.elements[h].value==null) || (form.elements[h].value=="")){
alert("Please enter "+document.myForm.elements[h].name);
document.myForm.elements[h].focus(); return false;
}
return true;
} }
===body-==
<FORM NAME="myForm" METHOD="post"
ACTION="http://ss1.prosofttraining.com/cgi-bin/process.pl">
Name:<BR>
<INPUT TYPE="text" size="30" NAME="name"><br>
Email address:<BR>
<INPUT TYPE="text" size="30" NAME="email address" onBlur="emailTest(this);"><br>
Phone number:<BR>
<INPUT TYPE="text" size="30" NAME="phone number"><br>
Fax number:<BR>
<INPUT TYPE="text" size="30" NAME="fax number"><p>
<INPUT TYPE="submit" VALUE="Submit Data" onClick="return checkForm(this.form);">
<INPUT TYPE="reset" VALUE="Reset Form">
</FORM>

Hi,

I am doing some studying and we was to create a small loop using either the for loop, while loop or do while loop. I chose to do the for loop because it was easier to understand, but I want to know how to do the same using the while loop. Here is the for loop I have, but I cant figure out how to change to while loop.

Code:

for (var i = 0; i < 5; ++i)
{
    for (var j = i; j < 5; ++j)
{
         document.write(j + "");
  }
  document.write("<br />");
}

output is equal to:
01234
1234
234
34
4

How do you make the same using a while loop?

For those who read my other thread I finally scratched together the code to take a value from an XML file and add it to a select box as an option. Ofcourse it only does it once so I need to loop it. It's kinda complex though, here's a function line to add one option:
addOption(document.people_form.People,name2,office2)

And here's the code in the head:

<script type="text/javascript">
//load xml file
if (window.ActiveXObject){
var xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
xmlDoc.async=false; //Enforce download of XML file first. IE only.
}
else if (document.implementation && document.implementation.createDocument)
var xmlDoc= document.implementation.createDocument("","doc",null);
if (typeof xmlDoc!="undefined")
xmlDoc.load("namedata.xml");

//Regular expression used to match any non-whitespace character
var notWhitespace = /\S/

function getnames(){
//Cache "messages" element of xml file
var nameobj=xmlDoc.getElementsByTagName("list")[0]

//REMOVE white spaces in XML file. Intended mainly for NS6/Mozilla
for (i=0;i<nameobj.childNodes.length;i++){
if ((nameobj.childNodes[i].nodeType == 3)&&
(!notWhitespace.test(nameobj.childNodes[i].nodeValue))) {
// that is, if it's a whitespace text node
nameobj.removeChild(msgobj.childNodes[i])
i--
}
}
}

if (typeof xmlDoc!="undefined"){
if (window.ActiveXObject) //if IE, simply execute script (due to async prop).
getnames()
else //else if NS6, execute script when XML object has loaded
xmlDoc.onload=getnames
}
var name2=xmlDoc.getElementsByTagName("name")[0].firstChild.nodeValue;
var office2=xmlDoc.getElementsByTagName("office")[0].firstChild.nodeValue;
var officePH2=xmlDoc.getElementsByTagName("officePH")[0].firstChild.nodeValue;
var mobile2=xmlDoc.getElementsByTagName("mobile")[0].firstChild.nodeValue;
var email2=xmlDoc.getElementsByTagName("email")[0].firstChild.nodeValue;
</script>
<script type="text/javascript">
function addOption(selectbox,text,value )
{
var optn = document.createElement("OPTION");
optn.text = text;
optn.value = value;
selectbox.options.add(optn);
}
</script>



Could anyone give me a pointer on how to loop this so that it loads one option after another from the XML file? Thanks.

I have a form that shows or hides divs based on what is chosen in a dropdown.

There are 4 divs but only one is shown and the other 3 hidden based on dropdown selection.

Inside each div are checkboxes with items for sale.

I want to reset the checkboxes to unchecked and the line total values to 0 if the div is hidden. I've got the checkboxes to reset but I can't figure out how to set the line total values to 0 (There are 14 total so I'm trying to loop thru all of them and reset them.)

This is what I have in the loop

Code:

	for (var i = 0; i < form.elements.length; i++ ) {
		if (form.elements[i].type == 'checkbox') {
			form.elements[i].checked = false;
 		}
	}
	 // set line_totals to 0
	 for (var j = 0; j< form.elements.length; j++ ) {
		if (form.elements [j].name.substring(0,10) == 'line_total') {
			form.elements[j].value = '';
 		}
	}

Hello, I recently purchased a JavaScript book, and I am confused by one of it's examples. I was wondering if anybody could answer my question.

Here is the example:

for (loopCounter = 1; loopCounter<= 3; loopCounter++)
{
//execute this code
}

Now, what I need help with is the variable part.

The book goes on to say: ""To keep track of how many times you have looped through the code, you need a variable to keep count"

My question is: Why does the variable have the value of one and not another number?

I'm very very new to JS, I understand that the loopCounter has to be les than or equal to 3 for the code to execute, and also that it is incremented by one each loop, but the book is not clear on why the value of the variable has been set to 1.

If anybody could answer this question I would be very grateful, I hate moving onto the next stage of a book if I do not completely understand the previous topics.

Thank you in advance

Hello all.

I am faitly new at programming and have run into a little problem.

I want to create a script that creates 2 random numbers, stored in 2 different variables and then compare them to eachother.

there is two possible outcome of that comparison, either they are different or they are alike.

If they are different i want to randomize a new set or numbers and make a other comparement, also to keep track on how many times i have created numbers.

If they are alike i want to display the numbers and how many tries it took to get a matching pair.


atm it looks like this

<html>
<body>
<script>
var x=(Math.floor(Math.random()*6)+1);
var y=(Math.floor(Math.random()*6)+1);
//creates two random int between 1 and 6
var throws = 1;
//keep tabs on how many times we have thrown the dices

if(x!=y)
{
x=(Math.floor(Math.random()*6)+1);
y=(Math.floor(Math.random()*6)+1);
throws=throws+1
}else{
document.write("you have rolled a pair. Dice 1 is: " +x +" and Dice 2 is: " +y +" and it took " +throws +" tries to get a pair.");
}

</script>
</body>
</html>


How to get that into a loop?

a really confused newbie scripter

Hey guys i've just been following a few tutorials and learnt how to do a for loop and a while loop, what is the major difference between the two? they seem quite similar? I know while loops are laid out a hell of a lot easier in my opinion!

I have the following code which is almost completely working the way I need it to with the exception of the "downloadFile" value...

Code:

/*Regex list of download file extensions, pipe and backslash delimited. Looks for the period before the file type so it will work on download links with query parameters after it */
var downloadTypes = /\.pdf|\.doc|\.xls|\.zip|\.csv|\.ppt|\.rtf|\.pptx|\.docx|\.xlsx|\.wmv|\.mpg|\.exe|\.mp3|\.rar|\.wav/i; 

/*Regex list of on-site domains, pipe and backslash delimited. */
var onsiteDomains = /\mytestdomain1\.com|\mytestdomain2\.com|javascript|#/i; 

/*Used to unobtrusivly add events to objects*/
function unobtrusiveAddEvent (element,event,fn) {
   var old = (element[event]) ? element[event] : function () {};
   element[event] = function () {fn(); old();};
}

var links = document.links;
if ( links ){
	for(var i=0; i<links.length; i++) {
		if( links[i].href.match(downloadTypes) ){
		unobtrusiveAddEvent( links[i], 'onclick' , function() { ntptEventTag('ev=download&eventPage=Download From: ' + escape( wa.currentDomain + wa.currentURL ) + '& downloadFile=' + escape( links[i] ) ); });
		}
		if( !links[i].href.match(onsiteDomains) ){
		unobtrusiveAddEvent( links[i], 'onclick' , function() { ntptEventTag('lk=1&ev=Exit Link'); });
		}
	}
}

...how do I grab the value of the href that was just clicked? links[i] is not working (it's just grabbing the href value of the last href in the loop). I am missing something simple for sure. Can anyone point out what I am missing?

Thanks!

Hi All,

im trying to to use a for loop to loop through a drop down list of users and if there is a match between the user logged in and the drop down list i want to enable two fields, if the user logged in isnt in the drop down list i want to disable the two fields,

but im having trouble looping through, iv tried ".value" with no avail.. heres my Script

Code:

            var RequestingUser = document.getElementById('JoinersLeaversContent_cmbRequestingUser').text;
            var Authorisers = document.getElementById('JoinersLeaversContent_ddlAuthoriseId');
            for (var i = 0; i < Authorisers.length; i++) 
            {
                if (RequestingUser.text == Authorisers.value) {
                    document.getElementById('JoinersLeaversContent_txtAuthoriserSig').disabled = false;
                    document.getElementById('JoinersLeaversContent_txtDateSignedOff').disabled = false;
                }
                else 
                {
                    document.getElementById('JoinersLeaversContent_txtAuthoriserSig').disabled = true;
                    document.getElementById('JoinersLeaversContent_txtDateSignedOff').disabled = true;            
                }
           }

So just to be clear, if the user logged in appears in the drop down box i want to enable the two fields, if they dont appear i want to disable the two fields

Please help.

Thank you

hi there here's my problem, I want to alert each innerHTML of the tag "a" when mouse over, but it only alert when i insert "return false;" in the end of the loop, what's the problem?
Code:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
	<title></title>
	<script type="text/javascript" >
	function show(){
	var linkIt = document.getElementsByTagName("a")
	for(var i=0; i<linkIt.length; i++){
	linkIt[i].onmouseover = function(){
	alert(linkIt[i].innerHTML);
		
	}
        return false;
	}
	}
	</script>
	
</head>
<body onload="show()">
  <ul id="imagegallery">
    <li>
      <a href="images/fireworks.jpg" title="A fireworks display">Fireworks</a>
    </li>
    <li>
      <a href="images/coffee.jpg" title="A cup of black coffee" >Coffee</a>
    </li>
    <li>
      <a href="images/rose.jpg" title="A red, red rose">Rose</a>
    </li>
    <li>
      <a href="images/bigben.jpg" title="The famous clock">Big Ben</a>
    </li>
  </ul>
</body>
</html>

Trying to use a "for" loop to cycle through an array and compare values; if the values are equal, then it displays a message about the team, etc.

Code:

<html>

<head>
	<title>Javascript Colors!</title>
	
	<script type="text/javascript">
	
		var teamcolors = ["blue","orange","Auburn Tigers","Yuck!","black","red","Georgia Bulldogs","Congratulations!","yellow","black","Georgia Tech","Awesome!"]
																					
	
		function changeBGColor()
		{	document.body.bgColor = prompt("What color should the background be?","Put ANY color here!");
			checkForTeamColors();	
		}
			
		function changeTXTColor()
		{	document.getElementById("text").style.color = prompt("What color should the text be?","Put ANY color here!");
			checkForTeamColors();
		}
			
		function checkForTeamColors()
		{	var bgcolor = document.body.bgColor
			var txtcolor = document.getElementById("text").style.color
			var loopcount = 1
			
			while (loopcount <= 12)
			{	if (  (bgcolor == teamcolors[loopcount] && txtcolor == teamcolors[loopcount + 1]) || (bgcolor == teamcolors[loopcount + 1] && txtcolor == teamcolors[loopcount])  )
				{	alert("You have picked the team colors of " + teamcolors[loopcount + 2] + ". " + taemcolors[loopcount+3])	}
				loopcount = loopcount + 4;
			}
		}
	</script>	
			
			
			
			
</head>

<body>

	<p id="text" align="center">This text will change color if you want to. <br> Maybe try a certain combination, like Orange and Blue, or Red and Black?<br></p>

	<button onClick="changeBGColor()">Click me to change the BG Color!</button>
	<button onclick="changeTXTColor()">Click me to change the text Color!</button>
	
	<p id="variables"></p>
	
	<script type="text/javascript"
		document.getElementById("variables").innerHTML = ( bgcolor + "   " + txtcolor )
	
</body>

</html>

Hi all,

I have a problem where I'm trying to load data into multiple divs. They are payslips, so p1, goes into january, p2 into febuary etc. I want to onLoad them all so when the page is loaded they are all displayed.

Every time I try this, the loop automatically goes to the last iteration, 6 in this example, so the only div that is loaded is p6.

Here is my code:

function replace(slip, year) { // table contains either 'bank' or 'intranet'

xmlHttpReq.open("POST", "do_payslips_ajax.php", true);
xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
xmlHttpReq.onreadystatechange=function() {

if(xmlHttpReq.readyState == 4) {

document.getElementById("p" + slip).innerHTML = xmlHttpReq.responseText;

}
}

xmlHttpReq.send(getquery(slip,year));

}

function getquery(slip,year) {

strQuery = "weekmonth=" + slip + "." + year;
return strQuery;

}

function loadpayslips(year) {

for (slip=1; slip<=6; slip++) {

replace(slip, year);

}

}

<label>
<body onload = loadpayslips(11)> search</a> &nbsp;&nbsp;
</label>

<div id="p1">
/div>

<div id="p2">
month 2</div>

<div id="p3">
month 5</div>

etc..

Any help would be appreciated.
Thanks

This might be a really stupid question. I'm new to javascript, and I'm wondering if it is possible to add a css class to a for Loop? Just so that I get this result without having to write every paragraph:

<code>
example
{
text-align:center;
height:100cm;
}
</style>
</head>

<body>
<p>0m</p>
<p>1m</p>
<p>2m</p>
<p>3m</p>
</body>
</code>

So this is what I have so far:
Code:

import java.util.Random;

public class lotteryGame
{
  public static void main(String args[]) throws Exception
 {
 int n=0; // counter for the amount of times played
 int t=0; // total amount of winnings
 int i=0; // number of matches
 int a; // first guess
 int b; // second guess
 int c; // third guess
 int d; // first number in the lottery
 int e; // second number in the lottery
 int f; // third number in the lottery
 Random rand = new Random();

while (n<100) // play the game for 100 times
{
 a=rand.nextInt(9) + 1; // assign a random number to a
 b=rand.nextInt(9) + 1;
 c=rand.nextInt(9) + 1;
 System.out.println("Lottery Number"+a+b+c);
 d=rand.nextInt(9) + 1;
 e=rand.nextInt(9) + 1;
 f=rand.nextInt(9) + 1;
System.out.println("Your guess"+d+e+f);
 if (a==d){
  i=i+1;
  System.out.println(a+"is a match");
  d=d+10; // if a=d then d is taken out of the range (1-9)
 }
 else if (a==e){
   System.out.println(a+"is a match");
  i=i+1;
  e=e+10;
 }
 else if  (a==f){
   System.out.println(a+"is a match");
  i=i+1;
  f=f+10;
 }
 if (b==d){ 
   System.out.println(b+"is a match");
  i=i+1;
  d=d+10;
 }
 else if (b==e){
   System.out.println(b+"is a match");
  i=i+1;
  e=e+10;
 }
 else if  (b==f){
   System.out.println(b+"is a match");
  i=i+1;
  f=f+10;
 }
 if (c==d){ 
   System.out.println(c+"is a match");
  i=i+1;
  d=d+10;
 }
 else if (c==e){
   System.out.println(c+"is a match");
  i=i+1;
  e=e+10;
 }
 else if  (c==f){
   System.out.println(c+"is a match");
  i=i+1;
  f=f+10;
 }
 if (i==3){
   if (a==d-10&&b==e-10&&c==f-10){
   t=t+10000;
   System.out.println("You win!!!");
   }
   else{ 
   t=t+1000;
   System.out.println("You had 3 matches! You win $1000");
   }
 }
 if (i==2){
  t=t+50;
  System.out.println("You had 2 matches! You win $50");
 }
 if (i==1){
   
  t=t+10;
  System.out.println("You had 1 match! You win $10");
 }
}

n=n+1;
i=0;
 }
}

I don't know what is wrong with the program, It compiles fine but when I run it, it never stops. =/
I figure that Code:

n=n+1

would be a counter to stop the while loop. Where do I place it so it can count everytime it runs. Or, What do I need to add in order for the program to stop running after 100 times?
Thank You. =]

Hi all!

I've been trying to figure this one out but am scratching my head.....

So here's what I'm trying to do. Creat a continuous text fade-in / fade-out

Basically I'm going to have a banner at the top of a page that loops through text from a db.

So, I get my data and create the divs and a csv that I pass to js as an array, all good, that works.

This is what it would look like:

Code:

<div id="div_one">
    Text 1......
</div>
<div id="div_two">
    Text 2......
</div>
<div id="div_three">
    Text 3......
</div>

And then the js array is Array('div_1,'div_2','div_3') etc

Now, this is where I'm getting mixed up, I want to loop that array of div id's and fade them in / out one by one, but I can;t seem to figure it out....

Here's what I've tried:

Code:

loop_running = false;
function start_loop(){
	loop_running = true;
}

function end_loop(){
	loop_running = false;
}
function loop(arr){
if(arr.length > 0){
		
		for(i=0;i<arr.length;i++){
			 if(loop_running == false){
				 // set loop_running var to true
				 start_loop();
				 // fade in div
				 fadeIn(arr[i], 1000);
				 // pause for 3 seconds then fade out
				 var t = setTimeout("fadeOut('"+arr[i]+"'), 1000", 3000);
				 // now set another timer to end the loop after 5 seconds
				 var e = setTimeout("end_loop()", 5000);
			 }
			 // now check to see if we're at the end of our array, if we are we need to call this function again to repeate
			 if(i == arr.length){
				 // repeat
				 loop(arr);
			 }
		}
		
	}
}

But that just gets the first div and then stops after fading out....

I've tried other variations too but with no avail..... I need to be able to tell the for loop to take 5 seconds for every one, so as it's looping it'll get the first div (first one in the aray), fade it up over one second, pause for 3 seconds then fade out, then get the next index in the array and do it again until it gets to the end of the array then it'll repeat.

Does anyone know what's wrong with the logic i'm using? I can't for the life of me see how to get this working.

Any advise will be gratefully received as always!