// JavaScript Document
<!--
function check_feedback()
{

   if(feedback.title.value=="") {
	document.feedback.title.focus();
    alert("Sorry:),Please key in the title!");
	return false;
  }
  
  if(feedback.username.value=="") {
	document.feedback.username.focus();
    alert("Sorry:),Please key in the name!");
	return false;
  }

 if(feedback.email.value.length!=0)
  {
    if (feedback.email.value.charAt(0)=="." ||        
         feedback.email.value.charAt(0)=="@"||       
         feedback.email.value.indexOf('@', 0) == -1 || 
         feedback.email.value.indexOf('.', 0) == -1 || 
         feedback.email.value.lastIndexOf("@")==feedback.email.value.length-1 || 
        feedback.email.value.lastIndexOf(".")==feedback.email.value.length-1)
     {
      alert("Sorry:),the email is wrong!");
      document.feedback.email.focus();
      return false;
      }
   }
 else
  {
   alert("Sorry:),Please key in the email!");
   document.feedback.email.focus();
   return false;
   }
}
//-->