// JavaScript Document

//function to check the zip code

function IsZip(snum){

	var reZip = /^(\d{5})$/

    return reZip.test(snum)

}

//function to check whether the variable is empty

function isEmpty(s){

	return ((s == null) || (s.length == 0)|| (s.substr(0,1) == " "))

}

function IsInteger(snum){

   var reInteger=/^\d+$/ ;

   return reInteger.test(snum);

}



function validemail(emailStr)

{	

	var err=0;

	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) {

		

		return false;

	}

	var user=matchArray[1];

	var domain=matchArray[2];

	if (user.match(userPat)==null) {

	  

	    return false;

	}

	var IPArray=domain.match(ipDomainPat);

	if (IPArray!=null) {

	  for (var i=1;i<=4;i++)

	  {

	    if (IPArray[i]>255)

	    {

		  

		   return false;

		}

	  }

	    return true;

	}

	var domainArray=domain.match(domainPat);

	if (domainArray==null) {

	

		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) {

	

	   return false;

	}

	if (len<2) {

	   

	   return false;

	}

	return true;

}