function validation()
	 {
		 
		 if(document.getElementById("name").value == "")
			 {
			   document.getElementById("name").focus();		
			   alert("Required field name ");	 
			   return false;
			 }
		 
		
		 
		 
		 	if(document.getElementById("email").value == "")
			 {
			   document.getElementById("email").focus();		
			   alert("Required field email ");	 
			   return false;
			 }
			 
			 
			 
			 var email = document.getElementById("email");
			
			  if(isEMailAddr(email) ==false)
				{
				   email.focus();
				   return false;
				}
				
			if(document.getElementById("subject").value == "")
			 {
			   document.getElementById("subject").focus();		
			   alert("Required field subject");	 
			   return false;
			 }	
				
	        
			 
		    return true;
	 }

function isEMailAddr(elem)
 {
    var str = elem.value;
    var re = /^[\w-]+(\.[\w-]+)*@([\w-]+\.)+[a-zA-Z]{2,7}$/;
    if (!str.match(re)) 
	{
        alert("Verify the e-mail address format.");
        
        return false;
    } 
	else 
	{
        return true;
    }
}