function CheckForm()
{
  // == v_name ======
  if (document.myform.message.value=="")
  {
    alert("留言内容不能为空！");
	document.myform.message.focus();
	return false;
  }
  //
  // == email ======
  if(document.myform.contact_way.value=="")
  {
	  alert("E-mail！");
	  myform.contact_way.focus();
	  return false;
  }
  else
  {
	  reg=/^([a-zA-Z0-9]+[_|\-|\.]?)*[a-zA-Z0-9]+@([a-zA-Z0-9]+[_|\-|\.]?)*[a-zA-Z0-9]+\.[a-zA-Z]{2,3}$/gi;
	  if(!reg.test(myform.contact_way.value))
	  {
		  alert("Wrong E-mail！");
		  myform.contact_way.focus();
		  return false;
	  }
  }
  return true;  
}
//// ======= Only Number =========
function isNum()
{
  return ((event.keyCode >= 48) && (event.keyCode <= 57));
}