SOURCE

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

writeDocument("最大值最小值--------")
writeDocument("最大值"+Math.max(1,9,8,77));

writeDocument("生成随机验证码");

function generateVerifyCode(length){
var strLetterNumber="1234567890qwerxcvbnm";
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));

function generatecolor(){
var colorR=Math.floor(Math.random()*256);
var colorG=Math.floor(Math.random()*256);
var colorB=Math.floor(Math.random()*256);
writeDocument("rgb("+colorR+","+colorG+","+colorB+")");

}
generatecolor();