SOURCE

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

writeDocument("最大值最小值----------");
writeDocument("最大值："+Math.max(1,3,9,13,19,139));
writeDocument("最小值："+Math.min(1,3,9,13,19,139));

writeDocument("生成4位数随机验证码");

function generateVerifyCode(length)
{
    var strLetterNumber="012345678929817284abcdefghijklmnopqrlstuvwxzyzs62981uwgjsabdasoo1w"
    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));

function generateVerifyCode1(length)
{
    var strLetterNumber="0123456789"
    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("生成随机的颜色 rgb(255,255,255)")

writeDocument('随机颜色'+generateVerifyCode1(3)+","+generateVerifyCode1(3)+","+generateVerifyCode1(3));