// JavaScript Document

 function Trim(x) {
	var i;
	if (x.length == 0) {return "";};
	i = x.length - 1;
	while (x.substring(i,i+1) == " " && i > 0 )  {
		x = x.substring(0,i);
		i--;
	}
	if (x.length == 0) {return "";};
	while (x.substring(0,1) == " " && x != "" )  {
		x = x.substring(1,x.length);
		i++;
	}
	return x;
}// end Trim

function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid E-mail ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

 		 return true					
}//echeck

function validate_form(){

    var f = document.contactForm;

    if (Trim(f.First_Name.value).length < 1) {
		alert("Please Enter your First Name");
		f.First_Name.focus();
		f.First_Name.select();
		return false;
	}
    if (Trim(f.Last_Name.value).length < 1) {
		alert("Please Enter your Last Name");
		f.Last_Name.focus();
		f.Last_Name.select();
		return false;
	}
	
	var emailID=document.contactForm.Email
	
	if ((emailID.value==null)||(emailID.value=="")){
		alert("Please Enter your Email ID")
		emailID.focus()
		return false
	}
	if (echeck(emailID.value)==false){
		emailID.value=""
		emailID.focus()
		return false
	}
	/*
	if (Trim(f.Comment.value).length < 5) {
		alert("Please Enter your Comments");
		f.Comment.focus();
		f.Comment.select();
		return false;
	}*/


	return true;
 }// validate_form