<script type="text/javascript">
var colors=["#5F9EA0","#FFFF00","cornflowerblue","green"];
var c_index =0;
var handle;
var s_index =4;
function setHM(){
handle =setInterval(showNowTm,1000);
}
function showNowTm(){
document.getElementById("div2").style.backgroundColor =colors[c_index];
c_index++;
if(c_index==4){
c_index=0;
}
if(s_index==0){
s_index=4;
}
}
function clearMM(){
window.clearInterval(handle);
</script>
<body>
<input type="button" name="btn1" id="btn1" value="冒泡方式" />
<input type="button" name="btn2" id="btn2" value="blingbling" />
</body>