// JavaScript Document
var reWhitespace = /^\s+$/

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


function isWhitespace (s)
{   
// Is s empty?
    return (isEmpty(s) || reWhitespace.test(s));
}
function isWhitespace (s)
{   
// Is s empty?
    return (isEmpty(s) || reWhitespace.test(s));
}

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					
	}



 function clear()
{
	document.engform.reset();  
}

function ValidateForm(){

	 if((document.engform.name.value == null)||isWhitespace(document.engform.name.value))
	 {       
	 alert("Please specify your Name");
	 document.engform.name.focus();       
	 return false;    
	 }
	
	var emailID=document.engform.email	
	if ((emailID.value==null)||(emailID.value==""))
	{
		alert("Please Enter your E-mail Address")
		emailID.focus();
		return false;
	}
	
	if (echeck(emailID.value)==false){
		emailID.value=""
		emailID.focus();
		return false;
	}
	
	if((document.engform.message.value == null)|| isWhitespace(document.form1.message.value))
	 {       
	 alert("Please specify your Message");
	 document.engform.message.focus();       
	 return false;    
	 }	 
	 return true;
 }