SOURCE

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

writeDocument("最大值最小值------------------------------");
writeDocument("最大值：" + Math.max(1,3,9,6,44));
writeDocument("最小值：" + Math.min(1,3,9,6,44));

writeDocument("生成随机码------------------------------");
function generateVerifyCode(length){
     var strLetterNumber = "46845316841GYFJVJFYB";
     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("生成随机颜色----------------------");
function generateVerifyCode(length){
   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();