$(function(){
    initPasswordEvent();
});

function initPasswordEvent(){
    var input=$('input[name="newInitPassword"]',$('#submitInitPasswordForm'));
    input.bind('blur',function(){
        pswStrength($(this).val());
    }).bind('keyup',function(){
        pswStrength($(this).val());
    });
}

//测试某个字符是属于哪一类.
function charMode(iN) {
    if (iN >= 48 && iN <= 57) //数字
        return 1;
    if (iN >= 65 && iN <= 90) //大写字母
        return 2;
    if (iN >= 97 && iN <= 122) //小写
        return 4;
    else return 8; //特殊字符
}

//计算出当前密码当中一共有多少种模式
function bitTotal(num) {
    var modes = 0;
    for (var i = 0; i < 4; i++) {
        if (num & 1) modes++;
        num >>>= 1;
    }
    return modes;
}

//返回密码的强度级别
function checkStrong(psw) {
    if (psw.length <= 3) return 0; //密码太短
    var modes = 0;
    for (var i = 0; i < psw.length; i++) {
        //测试每一个字符的类别并统计一共有多少种模式.
        modes |= charMode(psw.charCodeAt(i));
    }
    return bitTotal(modes);
}

//当用户放开键盘或密码输入框失去焦点时,根据不同的级别显示不同的颜色
function pswStrength(pwd) {
    var o_color = "#e0f0ff",l_color = "#FF0000",m_color = "#FF9900",h_color = "#33CC00";
    if (Public.isBlank(pwd)) {
        $.each([1,2,3],function(i,o){
            $('#passwordStrength'+o).css({backgroundColor:o_color});
        });
        return;
    } else {
        var level = checkStrong(pwd);
        switch (level) {
            case 0:
            case 1:
                $('#passwordStrength1').css({backgroundColor:l_color});
                $('#passwordStrength2').css({backgroundColor:o_color});
                $('#passwordStrength3').css({backgroundColor:o_color});
                break;
            case 2:
                $('#passwordStrength1').css({backgroundColor:o_color});
                $('#passwordStrength2').css({backgroundColor:m_color});
                $('#passwordStrength3').css({backgroundColor:o_color});
                break;
            default:
                $('#passwordStrength1').css({backgroundColor:o_color});
                $('#passwordStrength2').css({backgroundColor:o_color});
                $('#passwordStrength3').css({backgroundColor:h_color});
        }
    }
    return;
}
