function ValidateUserName(usern)
	{
		// Get the value of the UserName text box
		var strUserName = String(usern);
		var strCurrentChar;
		
		// This variable will determine if our string is valid
		var bolValidUserName = true;
		
		// Step through the UserName one character at a time...
		for (var iLoop=0; iLoop < strUserName.length; iLoop++)
		{
			// Check to see if the current character is valid
			strCurrentChar = strUserName.substring(iLoop,iLoop+1);
			
			if (
				// if A-Z...
				(strCurrentChar >= 'A' && strCurrentChar <= 'Z')
				// or if a-z...
				|| (strCurrentChar >= 'a' && strCurrentChar <= 'z')
				// or if 0-9...
				|| (strCurrentChar >= '0' && strCurrentChar <= '9')
				// or if dash or underscore
				|| strCurrentChar == '-' || strCurrentChar == '_'
			   );
			     //bolValidUserName = true;
			   // We have a valid string... do nothing.
			  else
			   // We have an invalid string, set the flag
			   bolValidUserName = false;
		}
		
		// If we have an invalid UserName, alert the user
		if (!bolValidUserName)
		{
			bolValidUserName=false;
		}
		
		return bolValidUserName;
	}

/* Function  To Check Valid Email	*/
function emailCheck (emailStr) {
var emailPat=/^(.+)@(.+)$/
var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
var validChars="\[^\\s" + specialChars + "\]"
var quotedUser="(\"[^\"]*\")"
var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
var atom=validChars + '+'
var word="(" + atom + "|" + quotedUser + ")"
var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
var matchArray=emailStr.match(emailPat)
if (matchArray==null) {
	alert("Email address seems incorrect (check @ and .'s)")
	return false
}
var user=matchArray[1]
var domain=matchArray[2]
if (user.match(userPat)==null) {
    alert("The username doesn't seem to be valid.")
    return false
}
var IPArray=domain.match(ipDomainPat)
if (IPArray!=null) {
	  for (var i=1;i<=4;i++) {
	    if (IPArray[i]>255) {
	        alert("Destination IP address is invalid!")
		return false
	    }
    }
    return true
}
var domainArray=domain.match(domainPat)
if (domainArray==null) {
	alert("The domain name doesn't seem to be valid.")
    return false
}
var atomPat=new RegExp(atom,"g")
var domArr=domain.match(atomPat)
var len=domArr.length
if (domArr[domArr.length-1].length<2 ||
    domArr[domArr.length-1].length>3) {
   alert("The address must end in a three-letter domain, or two letter country.")
   return false
}
if (len<2) {
   var errStr="This address is missing a hostname!"
   alert(errStr)
   return false
}
return true;
}