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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title> New Document </title>
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
</head>
<script type="text/javascript">
var i=0;
setInterval('changeColor()',500);
//var str=Math.ceil(Math.random()*16777215).toString(16);
function changeColor(){
var div=document.getElementById('div1'); //获得div元素
var color="#"+Math.ceil(Math.random()*16777215).toString(16); //建立颜色库
div.style.backgroundColor=color //循环颜色
}
</script>
<body>
<div id="div1" style="width:200px;height:200px;border:1px solid gray;background:blue;"></div>
</body>
</html>
<!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" />
<title>动态改变背景色</title>
</head>
<body>
<div style="width:200px;height:200px;display:block;background:#f60;" id="add">
</div>
</body>
<script>
function Dec2Any(str,num){
if(!/\d+/.test(str)) return NaN;
if(!/\d+/.test(num)) return NaN;
var num=eval(num);
if(num>36 || num<2) return NaN;
var the_str="0123456789abcdefghijklmnopqrstuvwxyz";
var str=eval(str);
var residue=0;
var result="";
while(true){
residue=str%num;
result = the_str.charAt(residue) + result;
if(str<num) break;
str=Math.floor(str/num);
}
return(result);
}
function GetRandomNum(Min,Max){
var Range = Max - Min;
var Rand = Math.random();
return(Min + Math.round(Rand * Range));
}
function GetHex(){
var the_Hex = Dec2Any(GetRandomNum(0,255),16);
if(the_Hex.length==1) the_Hex = "0" + the_Hex;
return the_Hex;
}
function GetHexColor(){
return GetHex() + GetHex() +GetHex();
}
function chcolor(){
document.getElementById("add").style.background="#"+GetHexColor();
}
setInterval("chcolor()",1000);//每1称执行一次
</script>
</html>
var auto=setInterval(function(){
$("div").css("backgroundColor","#"+randomcolor());
},1000);
function randomcolor(){
var str=Math.ceil(Math.random()*16777215).toString(16);
if(str.length<6){
str="0"+str;
}
return str;
}
<div style='width:200px;height:200px'></div>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title> New Document </title>
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
</head>
<script type="text/javascript">
var i=0;
setInterval('changeColor()',500);
function changeColor(){
var div=document.getElementById('div1'); //获得div元素
var colorArr=['#8A2BE2','#DEB887','#7FFF00','#008B8B','#FF1493']; //建立颜色库
if(i==colorArr.length){
i=0;
}else{
div.style.backgroundColor=colorArr[i++%colorArr.length]; //循环颜色
}
}
</script>
<body>
<div id="div1" style="width:200px;height:200px;border:1px solid gray;background:blue;"></div>
</body>
</html>