SOURCE

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

writeDocument("最大值最小值----------");
writeDocument("最大值："+Math.max(2,6,22,46,7,3));
writeDocument("最小值："+Math.min(2,6,22,46,7,3));

writeDocument("生产4位数随机验证码----------");

function generateVerifyCode(length){

    var strLetterNumber = "fivdouqgdoboq876931gody83gg3go";
    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("生产随机颜色 rgb(255,255,255)----------");
function getRandomColor() {
    var r = Math.floor(Math.random() * 256);
    var g = Math.floor(Math.random() * 256);
    var b = Math.floor(Math.random() * 256);
    var rgb = "rgb(" + r + "," + g + "," + b + ")";
    return rgb;
}
document.write(getRandomColor());