SOURCE

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

writeDocument("------------------最大值最小值------------------");
writeDocument("最大值："+Math.max(46,34,7,64,6,7));
writeDocument("最小值："+Math.min(46,34,7,64,6,7));

writeDocument("------------------生成4位随机验证码------------------");
function generateVerifyCode(length){
var strLetterNumber="0123456789ABCDEFGHIJKLMMOPQRST";
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("------------------生成随机的颜色：RGB（255，255，255）------------------");
function randomColor(){
var r=Math.floor(Math.random()*(255+1));
var g=Math.floor(Math.random()*(255+1));
var b=Math.floor(Math.random()*(255+1));
var rgb="RGB("+r+","+g+","+b+")";
return rgb;
}
document.write(randomColor());