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JavaScript - Rather Simple Javascript Loop Only Loops Once

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Rather Simple Javascript Loop Only Loops Once	View Content

This is driving me crazy.
I simply want to display the values of the checkboxes with a specific name.
This loop executes only once, then stops, showing no error msg.

I have found no similar problem elsewhere on the net and have done a ton of tests, but cannot find out why it won't continue to loop.

I've included the whole html file.

Please Help!

Code:

<HTML>
<SCRIPT language="JavaScript">
function test1()
{
var chkLen=document.frmTable.CHK0.length;
	for (k=0;k<chkLen;k++)
	{
		//execution stops after one loop. no error msg.
		document.write(document.getElementsByName('CHK0')[k].value);
	}
}
</SCRIPT>

<FORM NAME=frmTable>
<TABLE BORDER=1>
<TR>
<TD><INPUT TYPE=CHECKBOX NAME=CHK0 VALUE='one'>1</TD>
<TD><INPUT TYPE=CHECKBOX NAME=CHK0 VALUE='two'>2</TD>
<TD><INPUT TYPE=CHECKBOX NAME=CHK0 VALUE='three'>3</TD>
</TR>
</TABLE><BR>
<INPUT TYPE=BUTTON VALUE='Go' onClick=test1()>
</FORM>
</HTML>

Full Excel VBA Course - Beginner to Expert

Simple Javascript Loop

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Hi guys

I have what i think is a fairly simple script used for an image gallery with a next and back button. It seems to work pretty well, but i would like to make the gallery scroll round... ie when the user reaches the last picture and presses the next button again, the first image will be displayed again - and visa versa with the first image and the back button.

Below is my JS, can post the small amount of HTML that calls it if necessary.

Any help MUCH appreciated, been messing around with it for ages and being the newbie i am, can't seem to find any way of doing it

Code:

// List image names without extension
var myImg= new Array(6)
  myImg[0]= "performance2011";
  myImg[1]= "performance2005";
  myImg[2]= "performance2006";
  myImg[3]= "performance2007";
  myImg[4]= "performance2008";
  myImg[5]= "performance2009";
  myImg[6]= "performance2010";  

// Tell browser where to find the image
myImgSrc = "../images/";

// Tell browser the type of file
myImgEnd = ".jpg"

var i = 0;

// Create function to load image
function loadImg(){
  document.imgSrc.src = myImgSrc + myImg[i] + myImgEnd;
}

// Create link function to switch image backward
function prev(){
  if(i<1){
    var l = i
  } else {
    var l = i-=1;
  }
  document.imgSrc.src = myImgSrc + myImg[l] + myImgEnd;
}


// Create link function to switch image forward
function next(){
  if(i>5){
    var l = i
  } else {
    var l = i+=1;
  }
  document.imgSrc.src = myImgSrc + myImg[l] + myImgEnd;
}

// Load function after page loads
window.onload=loadImg;

Making One Loop From Many Small Loops

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How would I make this into one Loop using all same variables?

Right now I can only get his program to work with separate loops

Here is the Coding
Code:

script type="text/javascript">
for (var i=0; i<date.length; i++){
	document.write("<td>"+date[i]+"</td>");}
</script>
</td>
</tr>
<tr>
<script type="text/javascript">
for (var i=0; i<amount.length; i++){
	document.write("<tr>"+"<td>"+amount[i]+"</td>"+"</tr>");}
</script>
</tr>
<tr>
<script type="text/javascript">
for (var i=0; i<firstName.length; i++){
	document.write("<tr>"+"<td>"+firstName[i]+"</td>"+"</tr>");}
</script>
</tr>
<tr>
<script type="text/javascript">
for (var i=0; i<lastName.length; i++){
	document.write("<tr>"+"<td>"+lastName[i]+"</td>"+"</tr>");}
</script>
</tr>
<tr><td></td></tr>
</table>
</div>
	

</script>

Suggestions or examples to make this one loop

Need Help With Simple Js Stuff (functions,loops, Etc.)

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Hello,

Problem 1: I have a function and it sets a value to a certain number according to the input. However, I don't want the function to print out the value to the screen, but instead temporarily save it for me to use throughout the whole script. I am a newbie and please help me. For example, I make this code:

function add1(x) {
var x = x + 1
return x;
}

and I call the function:

add1(0);
document.write("value = " + x + "<BR>");

Whenever I do this, document.write doesn't print out value = 1, it doesn't even print anything except for the headers, etc. Is there anyway to set the var x to be a value valid throughout the whole script instead of just the function itself? I really need help on this, thanks.

Problem 2: I want to get a code working. Basically, I use a ram to "ram the gate". I set the damage done each turn, and the Gate's Health too. So for example, my ram's damage is 10 and the gate's health is 200. It would take 20 times to totally breach the gates(i.e., for gate health to become 0). When I use the following code, the total damage is the same throughout the whole looping until the gatehealth reaches 0 which makes it boring, is there anyway to modify or improve the script such that when I loop, the MiscDamage would be different for all the turns? thanks! Once again I apologize for asking such a noob-ish and very strange.... question.

Quote:
<script language="JavaScript" type="text/javascript">

</script>

For Loops And Javascript

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This is a final loops in an exercise

here is my code

Code:

<script type="text/javascript">

var counter;
for (counter=0; counter<amount.length; counter++) {}
	{
	document.writeIn(counter+"<br/>");
	
	document.writeIn("<tr><td>"date"[counter]"</td>");
	document.writeIn("<td class = 'amt'>myArray</td>");
	document.writeIn("<td>"firstName[counter]"</td>");
	document.writeIn("<td>"lastName[counter]"</td>");
	document.writeIn("<td>"street[counter]"<br />");
	document.writeIn("<td>"+street[counter]+" "+city[counter]+" "state[counter]+" "+zip[counter]+"</td></tr>);
	Total=total+amount[counter];
	document.writeIn("<table>");
	}
	

</script>

This is what i have, what do i need to do to make this more proper and written properly?
thanks

Loops In Javascript

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Hello all.

I've spent a few days now browsing this forum along with guides on the net, I'm new to JS and I'm having a bit of trouble with loops. I just don't seem to get them, I was wondering if anyone had any tips or methods (the simpler the better ) for getting these learnt and done with?

Would appreciate any tips

Thanks

Javascript Loops Performance

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Hi,

Which among the following for iterating objects in JavaScript is better in terms of performance & usage?

A) property enumeration:
for (var propName in someObject) {
var value = someObject[propName];
}

B) Array protocol
for (var i=0; i<someObject.length; i++) {
var value = someObject[i];
}

C) forEach method

Can forEach method be used across various browsers and OS?

K

Need Help With Basic Javascript For Loops

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Hi guys,
I am new to learning javascript and have a test tomorrow on for loops. I know the answers to the three following loops but i wondered if anyone could take the time to explain to me how to find the answer from the code as I have no idea on how to find the answers (the answer is what is displayed in the alert).
Many thanks,
Mike

The loops are these three:

1. var a=4;b=6; for(var c=0;c<=a;c++){b=b+c;} alert(b);
(answer is 16)

2. var v=1; for(i=1;i<5;i++) for(j=2;j<5;j++) v+=1; alert(v);
(answer is 13)

3. var s=0; for(i=0;i<=8;i++) if((i%2)==0)s+=1; alert(s);
(answer is 5)

Ok Javascript Function Not Work With Loops

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We have created this function with loops and arrays

Problem is the loops work only when I take out the function

when the function is in place, nothing works, it is part of exercise

anyone have suggestions

here is my code
Code:

title>Congressional Races</title>
<link href="results.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="votes.js"></script>
<script type="text/javascript"> 

function totalVotes(votes){ 
var total=0;
for (var i = 0; i <votes1.length; i++) {
total = total + votes1[i];
}
document.write(total);
}
</script>
}
</head>

<body>

thanks all who can help

Beginner Javascript Question (loops, Functions, Etc.)

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I want to learn javascript and I found codecademy.com which seems like a great way to learn the language. Before the first lesson it says

Quote:
You should be comfortable with loops, if statements, functions, and objects before attempting this course.
Can someone explain what these are or point me in the direction where I can find the answers? I tried searching with google, but I havent found anything that clearly states what exactly the loop, object, etc. is.

Simple Loop Question

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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

Exiting A Simple Do While Loop

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Code:

<script>

var rXL = "";

do
{

	rXL = prompt("Enter more entries? Y/N"); // IF Y or N is entered, the loop should in theory exit

}
while (rXL != "Y" || rXL != "N");

</script>

IF Y or N is entered, the above loop should in theory exit, however it results in a infinite loop :/.

Does anyone know what I'm doing wrong?

Thank you all .

Simple Loop Does Not Behave Right!

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Code:

<html>

<head>

<title>lightning generator</title>

</head>

<body>
<canvas id='world' width='500' height='500' style='border: 1px solid black; padding:0;'></canvas>
<script type="text/javascript">
var world = {
}
;
world.ground = {
}
;
world.ground.slice = [];
var ctx = document.getElementById( 'world' ).getContext( '2d' );
world.ground.make = function( GArray ){
   ctx.fillStyle = '#000';
   for ( var i = 0; i <= GArray.length; i ++ ){
      if ( GArray[i + 1] === null ){
         GArray[i + 1] = GArray[i];
      }
      world.ground.slice[i] = GArray[i];
      ctx.moveTo( i, - 500 );
      ctx.lineTo( i, GArray[i] );
   }
};
world.ground.make( [1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29] );
</script>
</body>
</html>

it should make a simple area at the bottom of the canvas thats black., a incling with a slope of 2 and than a straight line.
.....dots ar unfiled.....
..._____________
../
./filled area...
/

Simple Loop Problems With For, While, Nested, Arrays

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I am stuck on these problems and cannot figure them out! Any help would be appreciated. Thank you!

Code:

public int sumkj(int k, int j){
        // Complete the method using a for loop that will add the numbers from k to j, 
        //   where j is greater than k 
        int total = 0;
        // TODO: ADD LOOP CODE HERE
        return total;
    }
    
    // whilesum10
     public int whilesum10(){
        // Complete the method using a while loop that will add the numbers 
        //   from 1 to 10 
        int total = 0;
        int i = 1;
        // TODO: ADD LOOP CODE HERE
        return total;
    }
    
    
    // whilesumkj
    public int whilesumkj(int k, int j){
        // Complete the method using a while loop that will add the numbers 
        //   from k to j, where j is greater than k 
        int total = 0;
        int i = k;
        // TODO: ADD LOOP CODE HERE
        return total;
    }
    
    public int dosum10(){
        // Complete the method using a do-while loop (i.e. condition at end of loop) 
        //  that will add the numbers from 1 to 10
        int total = 0;
        int i = 1;
        // TODO: ADD LOOP CODE HERE
        return total;
    }
     
    public int dosumkj(int k, int j){
        // Complete the method using a do-while loop (i.e. condition at end of loop) 
        //  that will add the numbers from k to j, where j is greater than k 
        int total = 0;
        int i = k;
        // TODO: ADD LOOP CODE HERE
        return total;
    }
    
    public String arrayprint(){
      
      String msg = "";  
      String abc[] = new String[6];
              
      abc[0] = "a";
      abc[1] = "b";
      abc[2] = "c";
      abc[3] = "d";
      abc[4] = "e";
      abc[5] = "f";
      // Create a loop that will output the values stored in the array abc 
      // using a for loop and the array length
      // TODO: ADD LOOP CODE HERE

      return msg;
    }
             
    public String baseballOuts(){
       String msg = "";
       int totalOuts = 0;
       // Write a set of nested for-loops that willdetermine the number of
       //   outs in a regulation baseball game. Assume: 9 innings per game,
       //   2 halves per inning, 3 outs per half inning.
       //   You solution should include a loop (outer or nested) for each
       //   of the assumptions.
       // TODO: ADD LOOP CODE HERE
       msg = "Total number of outs in a regulation baseball game is " + totalOuts + ".";  
       return msg;  
    }
    
    public String factorial (int n){
      String msg = "";
      int factnum = 1;
      // Use a loop to calculate the factorial of an input integer.
      //   Note: If the input integer is too high an error may occur even if your 
      //   logic is correct. Why? At what value of input does the error occur? 
      //   How can you adjust the method so that either the error does not occur 
      //   or the method "fails gracefully?" Write your answers in the form of 
      //   a comment here.
      // TODO: ADD LOOP CODE HERE
      msg = n + "! = " + factnum;
      return msg;
    }
}

(simple?) Assigning Array Values In A Compounding Loop - Keep Getting Nan Or Undefine

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Okay, I am taking a js class and there is one minor bug that is driving me crazy with this assignment.

First, here is the code I wrote, then my question:

Code:

var games = ["Jacks","Chutes and Ladders","Extreme Uno","Bopit","Barbie Doll"];
var price = [4.00,15.99,25.00,27.99,32.00];
var inventory = [40,15,30,20,40];

//I could not figure out how to make this work without assigning values first. It was giving NaN.
var subtotal = [0,0,0,0,0];
var qtySold = [0,0,0,0,0];

function chooseItem() {
	var answer = 0;
	
	while (answer != 6) {
		var orderForm = "Choose a number below:\n";

		for (var i=0; i<games.length; i++) {
			orderForm = orderForm + (i + 1) + ".) " + games[i] + ": # in stock: " + inventory[i] + "\n";		
		}
		orderForm = orderForm + "6.) Show Sales Summary";
		answer = prompt(orderForm);
		answer = parseFloat(answer);
		
		if(answer != 6 && answer >= 1 && answer < games.length+1) {
			var qty = prompt("How many " + games[answer-1] + " would you like?");			
			qtySold[answer-1] = parseFloat(qtySold[answer-1]) + parseFloat(qty);
			subtotal[answer-1] = qtySold[answer-1] * price[answer-1];
		} else if (answer < 1 || answer > 6) {
			alert("Invalid Answer");
		} else {
			alert("Click OK to see your summary:");
		}
	}
	var summary = "Your Sales: \n";
	for (var j=0; j<qtySold.length; j++) {
		summary = summary + qtySold[j] + " " + games[j] + " at " + currency(price[j]) + " each for a total of " + currency(subtotal[j]) + "\n";		
	}
	alert(summary);
}

So basically, the arrays subtotal and qtySold need to retain values in case the "customer" chooses to add more of the same item in each order. What you see above works; however, when I alert the summary, it lists all of the items, even if there were none ordered. It simply says 0, but that is not what I want.

Basically, I only want the total to reflect only the items that were actually selected.

I do not what to do it this way:
Code:

var subtotal = [0,0,0,0,0];
var qtySold = [0,0,0,0,0];

I can effectively do this by NOT assigning any values to the qtySold array in the beginning: i.e. doing it this way:

Code:

var subtotal = new Array();
var qtySold = new Array();

The only problem is that when I do this, I get NaN at this point:
Code:

qtySold[answer-1] = parseFloat(qtySold[answer-1]) + parseFloat(qty);
			subtotal[answer-1] = qtySold[answer-1] * price[answer-1];

obviously, this is because I am referencing qtySold[answer-1]
directly in the loop - so the first time through, there is nothing assigned.

I can't (just before this line) assign 0 to each array item - to get it defined because if the user goes back in and adds more, it will always reset the number back to 0, which is not what I wanted.

I tried adding an if..else statement instead, but cannot figure out how to get that to work?

What are my options here?

Thanks!

Mike

Help With Simple Javascript Simple Converter

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I imagine this would be very simple for someone who knows javascript.

I want to have three fields.

First field is "posted speed limit", second field is "actual speed" and third field will be the output field.

All the script needs to do it subtract the posted speed from the actual speed and add a ZERO to the end; which is the amount of the speeding ticket. The minimum fine is $100, however.

So, 5 miles over the speed limit would be $100 (minimum value)
15 miles over the speed limit would be $150 (add a zero)
35 miles over the speed limit would be $350.
etc.

I know very little Javascript, if anyone could help me out with this, I'd appreciate it. Thanks, Sean

Javascript With Php Loop

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Hi Chaps,

I have a PHP loop script that returns Job Information for each Project.

What I've got so far is an Export to Excel (2007) function that displays the Project information on 1st tab, and the Job information on the 2nd.

The problem I've got is that the Export to Excel function, gathers the information from the HTML table ID, but when looping through the data (resulting in more than 1 Job for a Project), the only way I can differentiate is to use some PHP code, something like:

Quote:
id="tbl_job_<?php echo $job_id; ?>"
What I basically want is to store the information for each Job on a different Excel tab.

But whart I have seems to break the javascript:

Code:

<script language="javascript" type="text/javascript">  
function ExportToExcel() {		
			var xlApp = new ActiveXObject("Excel.Application");
			// Silent-mode:
			xlApp.Visible = true;
			xlApp.DisplayAlerts = false;
			var xlBook = xlApp.Workbooks.Add();
			xlBook.worksheets("Sheet1").activate;
			var XlSheet = xlBook.activeSheet;
			XlSheet.Name="Project";
			
			// Store the sheet header names in an array
			var rows = tbl_project.getElementsByTagName("tr");
			var columns = tbl_project.getElementsByTagName("th");
			var data = tbl_project.getElementsByTagName("td");
			
  			// Set Excel Column Headers and formatting from array
			for(i=0;i<columns.length;i++){
	   			XlSheet.cells(3,i+1).value= columns[i].innerText; //XlSheetHeader[i];
			}
			
			//run over the dynamic result table and pull out the values and insert into corresponding Excel cells
			var d = 0;
			for (r=4;r<rows.length+3;r++) { // start at row 2 as we've added in headers - so also add in another row!
				for (c=1;c<columns.length+1;c++) {
					XlSheet.cells(r,c).value = data[d].innerText;
					d = d + 1;
				}
			}
			
			//autofit the columns
			XlSheet.columns.autofit;
									
			xlBook.worksheets("Sheet2").activate;
			var XlSheet2 = xlBook.activeSheet;
			XlSheet2.Name="Job";
			
			// Store the sheet header names in an array
			var rows = tbl_job.getElementsByTagName("tr");
			var columns = tbl_job.getElementsByTagName("th");
			var data = tbl_job.getElementsByTagName("td");
			
  			// Set Excel Column Headers and formatting from array
			for(i=0;i<columns.length;i++){
	   			XlSheet2.cells(3,i+1).value= columns[i].innerText; //XlSheetHeader[i];
			}
			
			//run over the dynamic result table and pull out the values and insert into corresponding Excel cells
			var d = 0;
			for (r=4;r<rows.length+3;r++) { // start at row 2 as we've added in headers - so also add in another row!
				for (c=1;c<columns.length+1;c++) {
					XlSheet2.cells(r,c).value = data[d].innerText;
					d = d + 1;
				}
			}
			
			//autofit the columns
			XlSheet2.columns.autofit;
			
			// Make visible:
			xlApp.visible = true;
			xlApp.DisplayAlerts = true;
			CollectGarbage();
			//xlApp.Quit();
			
}
</script>

This is the bit I think I need to change to get the JS to work, but I'm a bit out of my depth!
Quote:
xlBook.worksheets("Sheet2").activate;
var XlSheet2 = xlBook.activeSheet;
XlSheet2.Name="Job";

// Store the sheet header names in an array
var rows = tbl_job.getElementsByTagName("tr");
var columns = tbl_job.getElementsByTagName("th");
var data = tbl_job.getElementsByTagName("td");
Any helpor guidence would be awesome!

Javascript For Loop

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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>

Loop Through Xml Using Javascript

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Use Javascript To Submit From But In Php Loop

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I want to submit form using javascript but as I see javascript doesn't work in php loop. I use this code:

Code:

<form name="theForm">
<input type=text name="formInput">
<a href="javascript:document.theForm.submit();">Submit</a>
</form>

and it works fine in ordinary page, but stops working in php loop! I need to use link, not button to submit form.

Can anyone please help?

Thanks in advance

Javascript Website Loop ....help Pls!

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Hey all, I need help creating a Javascript loop which posts a single static comment to all videos on a website(unless another language would prove to be a better alternative?) I'm not sure where to start and although I have an idea, my lack of programming skills have left me to turn to forums...any help would be greatly appreciated.

*not asking for coding necessarily. Links to relative information pertaining to such a program/"loop", and any comments helping me understand what I'm trying to do would be great...I'm just not sure what to search for lol. Im still learning, just need helping starting a project. Thanks.