// JavaScript Document
function validation()
{
	
 var d=document.myform;
// var radio_choice = false;

if(d.firstname.value=="")
	{
	
		alert("Please Enter First Name");
		d.firstname.focus();
		return false;
	}
	if(d.lastname.value=="")
	{
	
		alert("Please Enter Last Name");
		d.lastname.focus();
		return false;
	}
	
	
	
	
	if(d.email.value=="")
	{
	
		alert("Please Enter Your Email");
		d.email.focus();
		return false;
	}
	
	if(checkingEmail(d.email.value)==false)
	   {
		 alert("Invalid Email, Please re-enter");
		 d.email.focus();
		 return false;
	   }
 	   
	    if(d.phone.value == "")
 {
  alert("Please Enter Phone");
  d.phone.focus();
  return false;
 }
return true;
}

function checkingEmail(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) {
		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>4) {
		return false
	}
	if (len<2) {
	   return false
	}
	return true;


}	
function onlyint()
{
	if(event.keyCode==0x08){
		event.returnValue = true;
	}
	else if(event.keyCode==0x09){
		event.returnValue = true;
	}
   
	else if(event.keyCode==45){
		event.returnvalue=true;
	}
	else if(!(event.keyCode>=0x30 && event.keyCode <=0x39)){
				event.returnValue = false;
	}	
}