function chk(){
   if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(myform.email.value)){
	   if (myform.email.value == ""){ alert("E-Mail, please.");
			 myform.email.focus(); 
		 return false; }
	   if (myform.myname.value == ""){ alert("Your name, please.");
		   myform.myname.focus(); 
	   return false; } 
	   if (myform.tel.value == ""){ alert("Your phone number, please.");
		   myform.tel.focus(); 
	   return false; } 
	   if (myform.birthday.value == ""){ alert("Your birthday, please.");
		   myform.birthday.focus(); 
	   return false; } 
	   if (myform.add.value == ""){ alert("Your address, please.");
		   myform.add.focus(); 
	   return false; } 
	   if (myform.message.value == ""){ alert("Your suggestion, please.");
		   myform.message.focus(); 
	   return false; }
   return true;}
   {alert("Please keyin email");
     myform.email.focus();
   return false;}
}