jquery ajax传递中文参数乱码问题及解决方法说明

smsubmitclick = function(){
   $(document).ready(function(){
       var name = $("#txt_name").val();
       var type = $("#seltype option:selected").val();
       var zjnum = $("#txt_num").val();
       if(name == null || name =="")
       {
           alert("请输入您的真实姓名");
           return false;
       }
       if(name.length > 20)
       {
           alert("对不起，您的用户名存在异常，请重新输入");
           $("#txt_name").focus();
           $("#txt_name").val("");
           return false;
       }
       if(zjnum == null || zjnum == "")
       {
           alert("请输入证件号码");
           return false;
       }
       if(zjnum.length > 30)
       {
           alert("对不起，您的证件存在异常，请重新输入");
           $("#txt_num").focus();
           $("#txt_num").val("");
           return false;
       }
       else
       {
            $.ajax({
                type:"get",
                cache:false,
                contentType:"application/x-www-form-urlencoded:charset=UTF-8",
                url:"ajaxpage.aspx?t=smrz&name="+escape(name)+"&zjtype="+escape(type)+"&zjnum="+escape(zjnum)+"",
                dataType:"json",
                success:function(data){
                    alert(data.info);
                }
            })
       }
   })

}