用户注册检测（js）

    function isEmail(obj) {
        reg = /^\w{3,}@\w+(\.\w+)+$/;
        $("#emailSure").removeClass('imgSure');
        if (!reg.test(obj)) {
            $("#emailSure").attr("src", "img/error.png");
        }
        else {
            $("#emailSure").attr("src", "img/success.png");
        }
    }
    function isUserName(obj) {
        reg = /^[a-z,A-Z]+$/;
        $("#userSure").removeClass('imgSure');
        if (!reg.test(obj)) {
            $("#userSure").attr("src", "img/error.png");
        }
        else {
            $("#userSure").attr("src", "img/success.png");
        }
    }
    function isPassword(obj) {
        reg =/^[a-z,A-Z]w{5,17}$/;
        $("#passSure").removeClass('imgSure');
        if (!reg.test(obj)) {
            $("#passSure").attr("src", "img/error.png");
        }
        else {
            $("#passSure").attr("src", "img/success.png");
        }
    }
    function affirm(obj) {
        reg=/^[a-z,A-Z]w{5,17}$/;
        reg1 = $("#password1")[0].value;
        reg2 = $("#password2")[0].value;
        $("#passSure1").removeClass('imgSure');
        if (reg1 != reg2||!reg.test(obj)) {
            $("#passSure1").attr("src", "img/error.png");
        }
        else {
            $("#passSure1").attr("src", "img/success.png");
        }
    }