首先下载MD5加密的js文件（见附件）
代码如下：
<script src="__PUBLIC__/js/spark-md5.min.js"></script>//引入MD5 js加密文件
<script>
function check() {
var p, u, t, h, v, token;
p = $("#pwd").val();
authcode = $("input[name='authcode']").val();
u = $("#uid").val();
verify = $("input[name='verify']").val();
pa = authcode + p;
pass = SparkMD5.hash(pa); //前端md5加密
var url = "{:U('Public/dologin')}";
$.ajax({
beforeSend:function(){
var $sub=$("#sub");
$sub.text($sub.attr("data-loadingmsg"));
},
type:"POST",
url: url,
data: {
uid: u, hash: pass, verify: verify
},
dataType:"json"
}).done(function(result){
if (result.err == 3) {
$(".tips_error").text(result.msg);
window.location.href = "{:U('Index/index')}";
} else {
$(".tips_error").text(result.msg);
$(".verifycode-wrapper>img").trigger("click");
$("#sub").text("登录");
}
});
}
//回车时，默认是登陆
function on_return() {
$("body").on("keyup",function(e){
if(e.keyCode==13){
$("#sub").trigger("click");
}
})
}
$(on_return);
</script>