// JavaScript Document
function checkform()
{
var   pattern   =   /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/;
	if(document.addForm.gb_name.value=="")
	{
		alert("please enter your name!");
		document.addForm.gb_name.focus();
		return false;
	}
	
	
		if(document.addForm.gb_tel.value=="")
	{
		alert("please enter your tel!");
		document.addForm.gb_tel.focus();
		return false;
	}
	
	if(document.addForm.gb_email.value=="")
	{
		alert("please enter your email!");
		document.addForm.gb_email.focus();
		return false;
	}
	if(!pattern.test(document.addForm.gb_email.value))
	{
		alert("error your email!");
		document.addForm.gb_email.focus();
		return false;
	}
	if(document.addForm.gb_addr.value=="")
	{
		alert("please enter your country!");
		document.addForm.gb_addr.focus();
		return false;
	}
	if(document.addForm.gb_message.value=="")
	{
		alert("please enter your message");
		document.addForm.gb_message.focus();
		return false;
	}
}