function validateform()
{		
	var frm = document.aform;
	
	if (!isEmail(frm.txtEmail.value))
	{
		alert('Please enter a valid Email Address');
		frm.txtEmail.select();
		frm.txtEmail.focus();
		return false;
	}

	if (frm.txtEmail.value != frm.txtEmailConfirm.value)
	{
		alert('Please confirm yoru email address.');
		frm.txtEmailConfirm.select();
		frm.txtEmailConfirm.focus();
		return false;
	}

	return true;
}

var whitespace = " \t\n\r";
function isWhitespace (s)
{   
    var i;
    if (isEmpty(s)) return true;
    for (i = 0; i < s.length; i++)
    {   
        var c = s.charAt(i);
        if (whitespace.indexOf(c) == -1) return false;
    }
    return true;
}

function isEmpty(s) { return ((s == null) || (s.length == 0)) }

function isEmail (s)
{       
    // is s whitespace?
    if (isWhitespace(s)) return false;
    
    // there must be >= 1 character before @, so we
    // start looking at character position 1 
    // (i.e. second character)
    var i = 1;
    var sLength = s.length;

    // look for @
    while ((i < sLength) && (s.charAt(i) != "@")) { i++ }

    if ((i >= sLength) || (s.charAt(i) != "@")) return false;
    else i += 2;

    // look for .
    while ((i < sLength) && (s.charAt(i) != ".")) { i++ }

    // there must be at least one character after the .
    if ((i >= sLength - 1) || (s.charAt(i) != ".")) return false;
    else return true;
}