[avinash1109]

hello, i've been with this code for quite some time. I'm using an input text box to get a string from the user. Then using javascript, i'm looking for the location of the character in an array and then replace in by another character in a different array but at the same position.

The problem is that when i'm sending the output to a textbox,I'm getting an "undefined " message followed by the correct output. Can anyone help me how to get rid of the "undefined" message that is sent to the output text box.

Thanks in advance.
The javascript code is below:

function encrypt(){
var te= new Array('A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z');  
var encrypt=new Array('W','X','Y','Z','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','w','x','y','z','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v');

var str=document.getElementById("input").value;
var l=str.length;
var i,j;
var en,strde;

for(i=0;i<l;i++)
{ 
	for(j=0;j<54;j++)
		{
			if( te[j] == (str.charAt(i)) )
			{
			en = en + encrypt[j];
			}
		document.getElementById("output").value=en;
}
}
}

[deepamanohar]

hi just place empty string after the declaration of the variable "en"

 en="";

after this statement place your for loop.

the "undefined problem is solved"