// JavaScript Document 
function CheckFields(form)
{
   if(form.name.value.length == 0)
   {
      alert('Enter Your Name');
      form.name.focus();
      return false;
   }
 if(form.email.value.length == 0)
   {
      alert('Enter your email id');
      form.email.focus();
      return false;
   }
 if((form.email.value.indexOf("@")==-1)||(form.email.value.indexOf(".")==-1))
 	{
      alert('Please provide us a valid email id');
      form.email.focus();
      return false;
   }
 if(form.comment.value.length == 0)
   {
      alert('Please give your valuable feedback');
      form.comment.focus();
      return false;
   } 
}