Javascript not printing input Data

JavaScript
1

Hello All,
I am trying to get the data what user has given in 4 TextBox.But i could not get the data from javascript end.Can anyone please check and tell me the correct way( yes i wants to use for loop and the control name create dynamically).


<!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=iso-8859-1" />
<title>Untitled Document</title>
<script language="javascript">
function mfData()
{
var strData="";
for(var i=1;i<5;i++)
{
var pos='txt'+i;
if(eval('document.frm.'+pos+'.value')=="")
	{
	alert ("data not found"+pos);
	return false;
	}
	else
	{
    strData=strData+eval('document.frm.'+pos+'.value');
    }
}
alert (strData);
return true;
}
</script>

</head>

<body > 
<form name="frm">
<table>
<tr><td>User 1</td><td><textarea id="txt1" name="txt1"></textarea></td></tr>
<tr><td>User 2</td><td><textarea id="txt2" name="txt2"></textarea></td></tr>
<tr><td>User 3</td><td><textarea id="txt3" name="txt3"></textarea></td></tr>
<tr><td>User 4</td><td><textarea id="txt4" name="txt4"></textarea></td></tr>
<tr><td colspan="2"><input type="button" value="Click" name="nbtn" onclick="javascript:return mfData();" /></td></tr>
</table>
</form>
</body>
</html>
2

You can start by replacing

eval(‘document.frm.’+pos+‘.value’)

with

document.getElementById(pos).value

3

Now i have changed it to dom Object Model
The code is as follows:


function validateAllFields(objForm)
	{		
		      var count=document.frm.hdnCount.value;   
        	  var data="";
			  var checkStatus;
			   for(var i=1; i<=count; i++)     
    				{
					checkStatus=false;
					var pos1='txtAnswer_'+i;
					debugger;
					var strAns=document.getElementById(pos1);
					
					var pos='hdnQuestionID_'+i;
					var strQuest=document.getElementById(pos);
					
					if(strAns.Value!="")
						{
						data=data+"~"+strQuest.value+" $"+strAns.value;
						checkStatus=true;
						}
					
						if(!checkStatus)
						{
						alert("Please choose anyone from this question");
						document.getElementById(pos1).focus();
						return false;
                        }
					}
					alert(data);
					if(data!="")
					{
					data=data.substr(1);
					}			
		 document.frm.hdnQuestionAnswerData.value=data;      
         document.frm.mode.value='WARMUP';     
           return true;
		
		}