function CheckForm(theForm)
{  
	if(theForm.message_linkman.value=="")
   {
      alert("联系人不能为空，请填写！！"); 
	  theForm.message_linkman.focus(); 
	  return false;
    }
	if(theForm.message_linkman.value.length<2)
    {
		alert("联系人应该不能少于2位！");
		 theForm.message_linkman.focus(); 
		return false;
	}
		if(theForm.message_linkman.value.length>30)
    {
		alert("联系人应该不能大于30位！");
		theForm.message_linkman.focus(); 
		return false;
	}
	

	
	  if(theForm.message_linkphone.value=="")
   {
      alert("联系电话不能为空，请填写！！"); 
	  theForm.message_linkphone.focus(); 
	  return false;
    }
	
	  if(theForm.message_name.value=="")
   {
      alert("留言标题不能为空，请填写！！"); 
	  theForm.message_name.focus(); 
	  return false;
    }
	
	  if(theForm.message_content.value=="")
   {
      alert("留言内容不能为空，请填写！！"); 
	  theForm.message_content.focus(); 
	  return false;
    }	
}