function checkForm()
{
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9])+$/;

	if(document.forms[0].name.value.length == 0) { 
      document.forms[0].name.focus(); 
      alert("Please make sure you enter your name."); 
      return false; 
      }

	if(document.forms[0].email.value.length == 0) { 
      document.forms[0].email.focus(); 
      alert("Please enter your email address."); 
      return false; 
      }

	var x = document.forms[0].email.value;
	if (!(filter.test(x))) {
      document.forms[0].email.focus();
	alert("Please check your email address - it does not appear to be valid");
	return false;
	}

	if(document.forms[0].message.value.length == 0) { 
      document.forms[0].message.focus(); 
      alert("Please enter a short message."); 
      return false; 
      }

else return true;
}