JavaScript - Best Way To Dynamically Add Content If Tab Is Clicked?

I am building an online survey using a survey creation tool which allows me to incorporate javascript for additional functionality. However, I am new to javascript so would appreciate any help that you could provide me with.

I have question types like agreement scales, where the respondent sees a list of statements and has to rate each one by clicking on a radio button. The source code of the matrix table looks like this:

Code:

<thead><tr class="Answers">

			<th class='c1 BorderColor' width="25%" class='c1'> &nbsp; </th>
		<th class='c2 BorderColor' class='c2 yAxisBorder' > &nbsp; </th>
		<th class='c3 BorderColor' class='c3 yAxisBorder' > &nbsp; </th>
	
	
										
		<th width="25%" class='Selection BorderColor c4   ' id='header~QID19~1~4' >

			<label>Disagree</label>
		</th>
										
		<th width="25%" class='Selection BorderColor c5   ' id='header~QID19~2~5' >
			<label>Neither agree nor disagree</label>
		</th>
										
		<th width="25%" class='Selection BorderColor c6 last  ' id='header~QID19~3~6' >
			<label>Agree</label>

		</th>
	
	
</tr></thead><tr class='ChoiceRow   '><th class='c1' id='header~QID19~1'><span class='LabelWrapper'><label for='QR~QID19~1'>Statement 1</label></span> </th><td class='c2 BorderColor' class='c2 yAxisBorder' headers='header~QID19~1' > &nbsp; </td><td class='c3 BorderColor' class='c3 yAxisBorder' headers='header~QID19~1' > &nbsp; </td><td class='c4   ' headers='header~QID19~1~4 header~QID19~1'><input type='radio' name='QR~QID19~1' value='QR~QID19~1~1'  ></td><td class='c5   ' headers='header~QID19~2~5 header~QID19~1'><input type='radio' name='QR~QID19~1' value='QR~QID19~1~2'  ></td><td class='c6 last  ' headers='header~QID19~3~6 header~QID19~1'><input type='radio' name='QR~QID19~1' value='QR~QID19~1~3'  ></td></tr><tr class='ChoiceRow ReadableAlt  '><th class='c1' id='header~QID19~2'><span class='LabelWrapper'><label for='QR~QID19~2'>Statement 2</label></span> </th><td class='c2 BorderColor' class='c2 yAxisBorder' headers='header~QID19~2' > &nbsp; </td><td class='c3 BorderColor' class='c3 yAxisBorder' headers='header~QID19~2' > &nbsp; </td><td class='c4   ' headers='header~QID19~1~4 header~QID19~2'><input type='radio' name='QR~QID19~2' value='QR~QID19~2~1'  ></td><td class='c5   ' headers='header~QID19~2~5 header~QID19~2'><input type='radio' name='QR~QID19~2' value='QR~QID19~2~2'  ></td><td class='c6 last  ' headers='header~QID19~3~6 header~QID19~2'><input type='radio' name='QR~QID19~2' value='QR~QID19~2~3'  ></td></tr><tr class='ChoiceRow  bottom '><th class='c1' id='header~QID19~3'><span class='LabelWrapper'><label for='QR~QID19~3'>Statement 3</label></span> </th><td class='c2 BorderColor' class='c2 yAxisBorder' headers='header~QID19~3' > &nbsp; </td><td class='c3 BorderColor' class='c3 yAxisBorder' headers='header~QID19~3' > &nbsp; </td><td class='c4   ' headers='header~QID19~1~4 header~QID19~3'><input type='radio' name='QR~QID19~3' value='QR~QID19~3~1'  ></td><td class='c5   ' headers='header~QID19~2~5 header~QID19~3'><input type='radio' name='QR~QID19~3' value='QR~QID19~3~2'  ></td><td class='c6 last  ' headers='header~QID19~3~6 header~QID19~3'><input type='radio' name='QR~QID19~3' value='QR~QID19~3~3'  ></td></tr><input type=hidden name='Transformation~QID19~1' value='YToxOntzOjEwOiJRUn5RSUQxOX4xIjtzOjE2OiJ7dmFsdWV9PVNlbGVjdGVkIjt9' id=''><input type=hidden name='Transformation~QID19~2' value='YToxOntzOjEwOiJRUn5RSUQxOX4yIjtzOjE2OiJ7dmFsdWV9PVNlbGVjdGVkIjt9' id=''><input type=hidden name='Transformation~QID19~3' value='YToxOntzOjEwOiJRUn5RSUQxOX4zIjtzOjE2OiJ7dmFsdWV9PVNlbGVjdGVkIjt9' id=''></table></div>

I don't have any control over the HTML as this is generated by the survey tool. However, the survey tool has a "JavaScript Editor" for each question, where I can put in javascript functions, and it executes them when the page loads.

What I want to do is to have the label for each row (i.e for each statement) to change color when a corresponding radio button has been selected. This way, it is easier for respondents to see which rows they have answered.

I used the following JS code:

Code:

var radioname = [];
var radiolist = [];
var labelspans = [];
var labels = [];
var radios = [];
var count;
var spans = document.getElementsByTagName('span');

function getLabels()
  {
    for (x=0; x<spans.length; x++)
  {
    if (spans[x].className == "LabelWrapper")
    {
      labelspans.push(spans[x]);
    }
  }
    for (y=0; y<labelspans.length; y++)
  {
   labels.push(labelspans[y].firstChild);
   radioname.push(labelspans[y].firstChild.htmlFor);
  }
}
  
function getRadios()
{   
  //will put all radio groups into the "radiolist" array
  for (z=0; z<radioname.length; z++)
   {
     radiolist.push(document.getElementsByName(radioname[z]));
     //will add Event Listener to each radio button, and add each one to the "radios" array
     for (i=0; i<radiolist[z].length; i++)
       {
        chkradio = radiolist[z][i];
        chkradio.setAttribute("count",Number(z));
        chkradio.addEventListener("click", function(){changeLabel()}, false);
        radios.push(chkradio);
       }
  }
}

function changeLabel()
//loops through all the radios to check if they are selected, and changes label color accordingly          
   {
    for (w=0; w<radios.length; w++)   
      {
       if (radios[w].checked)
           {
            a = radios[w].getAttribute("count");
            labels[a].innerHTML = labels[a].innerHTML.fontcolor("green");
           }
       }
    }
getLabels();  
getRadios();

This code works as intended; however, as you can see, it loops through all the radio buttons when one is clicked. Is there a way to accomplish this without looping through all the radios, and thus make the script run faster?

Also, I have read that the addEventListener function does not work for older versions of IE. Is there a simpler alternative?

Hello All,

I have a code which works fine for what is does but I want to add in dynamically a new list to the Array...... from an input field.

The relevent part of the code reads as this for example........

var step_x_list=new Array("ca1sb2en1pg1itm1","ca1sb2en1pg1itm2","ca1sb2en1pg1itm3")

but I need a way to dynamically replace the existing.... "ca1sb2en1pg1itm1","ca1sb2en1pg1itm2","ca1sb2en1pg1itm3" seen above with a new list from an input field which holds the following say....... ca2sb2en2pg1itm1","ca2sb2en2pg1itm2","ca2sb2en2pg1itm3

I have tried various ideas but none seem to be able to inject the new values in the space between the brackets.

Any thoughts.

Martin.

For those just wondering what the code is and want to try it, it is a one piece code which can fire many different functions without requiring lots of individual bits of code to do same. The action usually happens in micro-seconds but I slowed it to a one second count between changes so you can see what is actually happening.

Below is a revised code if you want to see it working and also to give an idea about the Array part in which I want to add a different number set.
Copy the code and save in notepad as test.html
It can be opened as a web page. Remember to change the code tags to the correct script tags


Code:

var i_x_list=0
function fireFunctionList_x_list()
{
if (document.getElementById("locate_load_x_list").value == "end" || document.getElementById("locate_load_x_list").value == "undefined"){i_x_list=0;document.getElementById("locate_load_x_list").value=""}else{fireFunctionList_x_list_do()}
}
function fireFunctionList_x_list_do()
{
document.getElementById("addto").value="place_";
var step_x_list=new Array("ca1sb2en1pg1itm1","ca1sb2en1pg1itm2","ca1sb2en1pg1itm3","ca1sb2en1pg1itm4","ca1sb2en1pg1itm5","ca1sb2en1pg1itm6","ca1sb2en1pg1itm7",
"ca1sb2en1pg1itm8","ca1sb2en1pg1itm9","ca1sb2en1pg1itm10","ca1sb2en1pg1itm11","ca1sb2en1pg1itm12","ca1sb2en1pg1itm13","ca1sb2en1pg1itm14","end")
document.getElementById('locate_load_x_list').value=step_x_list[i_x_list]
i_x_list=i_x_list+1
document.getElementById("addto").value+=document.getElementById("locate_load_x_list").value;
document.getElementById("final_locate_load_x_list").value=document.getElementById("addto").value;
document.getElementById("final_locate_load_x_list").value+=document.getElementById("addto2").value;
var x_list = document.getElementById("final_locate_load_x_list").value;
setTimeout("fireFunctionList_x_list()",1000)
var f_x_list = new Function(x_list); f_x_list();
}

<BR><BR>
<button onclick="fireFunctionList_x_list()">run the function list rotation</button>
<BR><BR>
<input id="addto" type="text" size=25 value="place_"><BR>
<input id="addto2" type="text" size=4 value="()"><BR>
<input id="locate_load_x_list" type="text" size=20 value=""><BR>
the code fires this function if there<input id="final_locate_load_x_list" type="text" size=25 value=""><BR>
Code:

 function place_ca1sb2en1pg1itm4(){alert("ca1 number4 function dummy run as alert");}

Code:

 function place_ca1sb2en1pg1itm9(){alert("ca1 number9 function dummy run as alert");}

Code:

 function place_ca2sb2en1pg1itm6(){alert("ca2 number6 function dummy run as alert");}

Code:

 function place_ca2sb2en1pg1itm12(){alert("ca2 number12 function dummy run as alert");}

Hi ,

I am new to javascript and have coded an invoice page through help from some available content on web.

here is my requirement

My form contains inputs "item ,rate quantity,price" in a tabular form where one can dynamically add or delete rows.And the requirement is that

when Quantity is entered the Price should change to Price=Quantity*Rate on tab out

So I have used a Javascript onchange() and this works fine for the first displayed row. but for dynamically added rows this does not happen, I am not able change the price value for dynamically added rows.

Code is as below
direct_invoice.html


Code:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<script type="text/javascript" src="js/direct_invoice_table.js">

</script>

<html>
     <head>
          <title>Direct Invoice</title>
     </head>
     <body leftmargin="0" topmargin="0">
	 
	 <p align = "center" font='30'><input type="text" name="company_name" size="20" maxsize="20" />
	  <b> Invoice</b></p>
	 
		<table id="Client_Details">
		  <tr>
			<th>Client Name:</th>
			<td><input type="text" name="client_name" size="20" maxsize="20" /></td>
		  </tr>
		  <tr>
			<th>Client Address:</th>
			<td><input type="text" name="address_line1" size="20" maxsize="40" /></td>
		  </tr>
		  <tr>
		  <td></td>
			<td><input type="text" name="address_line2" size="20" maxsize="40" /></td>			
		  </tr>
		  <tr>
			<th>Pin Code:</th>
			<td><input type="text" name="client_pin" size="7" maxsize="7" /></td>		
		  </tr>		  
		  <tr>
			<th>City/State/Country:</th>
			<td><input type="text" id="client_city" size="10" maxsize="30" /></td><td>/</td>
			<td><input type="text" id="client_state" size="10"  maxsize="20" /></td><td>/</td>
			<td><input type="text" id="client_country" size="10" maxsize="20" /></td>			
		  </tr>
		<tr>
			<th>Email Address:</th>
			<td><input type="text" name="client_city" size="10" maxsize="30" /></td>			
		  </tr>
		<tr>
			<th>TIN/PAN:</th>
			<td><input type="text" name="tin_or_pan" size="10" maxsize="20	" /></td>			
		  </tr>		  
		</table>
	 
	                <table align="center" width = "75%">
                    <tr>
                         <td align = "center">
                              <!--- very imporant to give the table an id --->
                              <!--- otherwise it won't know where to edit --->
                              <table border="1" id="mySampleTable">
                                     <tr>
									 	<th>Item No</th>
										<th>Item Name</th>
										<th>Description</th>
										<th>Unit Cost</th>
										<th>Quantity</th>
										<th>Price</th>
										<th> <font color="RED">Delete</font></th>
                                   </tr>
									<tr>
										<td>1</td>
					<td><input type="text" name="itemname[]"  size="40" "maxsize="100"/></td>
					<td><input type="text" name="description[]" size="20" " maxsize="100" /></td>
					<td><input type="text" id = "unitcost[]" name="unitcost[]" size="10" maxsize="100" /></td>
					<td><input type="text" id = "quantity[]" name="quantity[]" onchange="dynamic_onc();" size="4" maxsize="100" /></td>
					<td><input type="text" id = "price[]" name="price[]" size="10" maxsize="100" /></td>
								   </tr>
							  </table>
								<table id="totaltbl" align="right">
								<tr>
								  <td></td>
								 </tr>
								  <tr>
									<th>Vat %</th>
									<td><input type="text" name="total" size="3" maxsize="3" /></td>
								  </tr>
								  <tr>
									<th>Total</th>
									<td><input type="text" id = "total"  name="total" size="20" maxsize="100" /></td>
								  </tr>
								</table>

	
                         </td>
                    </tr>
               </table>
          <form action="save_entry.php" name="eval_edit" method="post" format="html">
					<p>	
						<input type="button" value="Add Row" onclick="addRow();" />	
						<input type="button" value="Calculate Total Amount" onclick="Totalcal();" />	
						<input type="button" value="Print" />
					
					</p>
          </form>
		  
		  	 <p align = "left" font='100'> <b>Company Name: </b> <input type="text" name="company_address_line1" size="20" maxsize="20" />
	  </p>
	  <p align = "left" font='100'> <b>Company address line: </b> <input type="text" name="company_address_line2" size="20" maxsize="20" /></p>
	  	  <p align = "left" font='100'> <b>Company Location: </b><input type="text" name="company_address_location" size="20" maxsize="20" /></p>
     </body>
</html>

***************

The below is the javascript function that i wrote


Code:

function addRow()
     {
          // grab the element, i.e. the table your editing, in this we're calling it 
          // 'mySampleTable' and it is reffered to in the table further down on the page 
          // with a unique of id of you guessed it, 'mySampleTable'
          var tbl = document.getElementById('mySampleTable');
          // grab how many rows are in the table
          var lastRow = tbl.rows.length;

          // if there's no header row in the table (there should be, code at least one 
          //manually!), then iteration = lastRow + 1
          var iteration = lastRow;
		  
          // creates a new row
          var row = tbl.insertRow(lastRow);

          // left cell
          // insert a cell
          var cellLeft = row.insertCell(0);
          // here we're just using numbering the cell, like anything else you don't
          // have to use this, but i've kinda noticed users tend to like them
          var textNode = document.createTextNode(iteration);
          // takes what we did (create the plain text number) and appends it the cell
          // we created in the row we created. NEAT!
          cellLeft.appendChild(textNode);

          // right cell
          // another cell!
          var cellRight1 = row.insertCell(1);
          // creating an element this time, specifically an input
          var el = document.createElement('input');
          // a data type of text
          el.type = 'text';
          // the name of the element itemname, and because this is dynamic we also
          // append the row number to it, so for example if this is the eigth row
          // being created the text box will have the name of itemname8. super fantastic.
          // the exact same thing with a unique id
          el.id = 'itemname[]'+ iteration;
          // set it to size of 40. setting sizes is good.
          el.size = 40;
          // same thing as earlier, append our element to our freshly and clean cell
          cellRight1.appendChild(el);
		  
    	  var cellRight2 = row.insertCell(2);
          var e2 = document.createElement('input');
          e2.type = 'text';
          e2.id = 'description[]' + iteration;
          e2.size = 20;
	      e2.maxsize = 100;
          cellRight2.appendChild(e2);

    	  var cellRight3 = row.insertCell(3);
          var e3 = document.createElement('input');
          e3.type = 'text';
          e3.id = 'unitcost[]' + iteration;
          e3.size = 10;
 	      e3.maxsize = 100;
          cellRight3.appendChild(e3);
	
    	  var cellRight4 = row.insertCell(4);
          var e4 = document.createElement('input');
          e4.type = 'text';
          e4.id = 'quantity[]'+ iteration;
          e4.size = 4;
 	      e4.maxsize = 100;
	
          cellRight4.appendChild(e4);

    	  var cellRight5 = row.insertCell(5);
          var e5 = document.createElement('input');
          e5.type = 'text';
          e5.id = 'price[]'+ iteration;
          e5.size = 10;
		  e5.maxsize = 100;
		  
          cellRight5.appendChild(e5);
	  
		 // var cellRight7 = row.insertCell(7);
         // var e7 = document.createElement('input');
         // e7.type = 'CHECKBOX';
         // e7.id = 'cancel[]';
         // cellRight7.appendChild(e7);
		
		  var cellRight6  = row.insertCell(6);
		  cellRight6.innerHTML = "&nbsp;&nbsp;<input type='button' value='Delete' size='6' onclick='removeRow(this);'/>";
		
          e4.onclick = dynamic_onc();	
			
     }

	function removeRow(src)
	{
		/* src refers to the input button that was clicked.	
		   to get a reference to the containing <tr> element,
		   get the parent of the parent (in this case case <tr>)
		*/			
		var oRow = src.parentElement.parentElement;		
		
		//once the row reference is obtained, delete it passing in its rowIndex			
		document.all("mySampleTable").deleteRow(oRow.rowIndex);		
	}
	function countRow()
	 {
		var Rowcount = document.getElementById('mySampleTable').rows.length;
		document.eval_edit.count.value = Rowcount-1;
		
	 }
	 	function CalculatePrice()
	 {
		var Rowcount = document.getElementById('mySampleTable').rows.length;
		document.eval_edit.count.value = Rowcount-1;
		
	 }
	 
	     function onc() {
	
        var a= document.getElementById('unitcost[]');
        var b= document.getElementById('quantity[]');
		var c = Math.ceil(a.value*b.value);
			alert(b);
	document.getElementById('price[]').value =c;
	
 }
		
		function dynamic_onc()
		{
		alert('Jay'	);
		e5.value =7;		
		}
		
		function Totalcal() {
		var a= document.getElementById('unitcost[]');
        var b= document.getElementById('quantity[]');
		var c = Math.ceil(a.value*b.value);
		alert(b.value);
		document.getElementById('price[]').value =c;
		}

serverless situation where applet drives document scanner and captures images.
Currently use data uri technique <img src="data:image/jpg;base64,BLAHBLAHBLAH> to dynamically change img src (image fed from the applet) when user wants to view a particular image.

Works great in firefox...
In ie8, however, the 32K limit on data uri's stops me cold.

I researched switching over to MHTML techniques for IE only....but without server-side generation of the MHTML (or CSS), I am running into issues.

Does anyone know of a way to dynamically 'inject' MHTML content via javascript into current document for use as MHTML image ?

<script language="JavaScript">

function changeColor(cell_id){var state1="#dde6ed"; var state2="#ffc20e"; var cellid = new Array ("id1", "id2", "id3", "id4", "id5", "id6"); for(var i = 0; i < cellid.length; i++){var nav = document.getElementById(cellid[i]); if(cellid == nav.id){nav.style.backgroundColor=state2;} else {nav.style.backgroundColor=state1;}}}
</script>

Can anyone tell me what is wrong with this script. I put an onClick= changeColor(this);" in my <td> tag to call the script but still not working.