<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><style type="text/css">body{font-size:12px;font-family:"Courier New", Courier, monospace;letter-spacing:5px;}ul{list-style:none;}li{width:130px;height:130px;line-height:130px;vertical-align:middle;text-align:center;float:left;margin-left:20px;}</style><script src="http://code.jquery.com/jquery-1.11.0.min.js"></script><title>javascript Generate random colors </title><script type="text/javascript">$(function(){$("ul li").each(function(){$(this).css("background-color",getRandomColor());});})function getRandomColor(){var c = '#';var cArray = ['0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'];for(var i = 0; i < 6;i++){var cIndex = Math.round(Math.random()*15);c += cArray[cIndex];}return c;}</script></head><body><div><ul><li> The first color block </li><li> Second block </li><li> The third color block </li><li> The fourth color block </li></ul></div></body></html>