dwr 无刷新登录 js不拦截判断 错误的用户和密码也能提交 function checkname() { var zhi=""; var uname=document.getElementById("petname").value; var password=document.getElementById("paswd").value; //return false; uname=uname.replace(/(^\s*)|(\s*$)/g,""); password=password.replace(/(^\s*)|(\s*$)/g,""); if(uname.length==0||password.length==0){ document.getElementById("jg").style.display="block"; document.getElementById("xx").style.display="none";