SOURCE

function writeDocument(variable) {
    document.write(variable + "<br/>");
}


writeDocument("生成随机验证码----------------");

function generateVerifyCode(length){
    var strLetterNumber = "0123456789ABCDEFGHIJKLMNOPQRST*&%@!~()";
    var code = "";
    for(var i = 0; i < length; ++i) {
        var randomNumber = Math.floor(Math.random() * strLetterNumber.length);
        code = code + strLetterNumber.charAt(randomNumber);
    }

    return code;
}

writeDocument(generateVerifyCode(4));
writeDocument(generateVerifyCode(5));
writeDocument(generateVerifyCode(6));

writeDocument("用Math的方法找出45,33,97,23,55,14中的最大值和最小值-----------");
writeDocument("最大值：" + Math.max(45,33,97,23,55,14));
writeDocument("最小值：" + Math.min(45,33,97,23,55,14));

writeDocument("请写一个随机生成颜色值rgb(X,Y,Z)的函数，其中X,Y,Z表示的是0-255的数字---");

function generteRandomColor() {
    var red = Math.floor(Math.random() * 256);
    var green = Math.floor(Math.random() * 256);
    var blue = Math.floor(Math.random() * 256);

    writeDocument("rgb(" + red + "," + green + "," + blue + ")");
}

generteRandomColor();