function getQueryVariable(variable)
    {
           var query = window.location.search.substring(1);
           var vars = query.split("&");
           for (var i=0;i<vars.length;i++) {
                   var pair = vars[i].split("=");
                   if(pair[0] == variable){return pair[1];}
           }
           return(false);
    }
     // 解码中文字符串 ?laiyuan=xxxx
     var laiyuan = decodeURI(getQueryVariable("laiyuan"));
     // 赋值给属性id为laiyuan的input框
     document.getElementById("laiyuan").value = laiyuan;