var whitespace = " \t\n\r";
function ValidateInput(form){
    var defaultEmptyOK = false;
		var s ;
		s = form["ea"].value;	
		
	 if(isEmpty(s) || isWhitespace (s)  )
                    {      
    	           alert("Please enter E-Mail Address ." );
				   form["ea"].focus();
	            	return false;
					}	
					 
	 if(!isEmail(s))
					{
	                alert("Incorrect email format ." );
				    form["ea"].focus();
		   	      	return false;
					}
return true;
}
	function isEmpty(s)
	{  
	return ((s == null) || (s.length == 0))
	}
	function isWhitespace (s)
	{
 	   for (i = 0; i < s.length; i++)
 	   {   
 	       var c = s.charAt(i);
 	       
	       if (whitespace.indexOf(c) == -1) return false;
 	   }
 	   
	    return true;
     }
function isEmail(s)
           { 
           
                if (isWhitespace(s)) return false;
           var i = 1;
           var sLength = s.length;
           while ((i < sLength) && (s.charAt(i) != "@"))
           { i++
           }
           if ((i >= sLength) || (s.charAt(i) != "@")) return false;
           else i += 2;
           while ((i < sLength) && (s.charAt(i) != "."))
           { i++
           }
           if ((i >= sLength - 1) || (s.charAt(i) != "."))
                return false
		else 
		 return true;
}