js Thread 效果

 

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window.setTimeout第一种用法(延时)：<p></p><div id="aa"></div>

<script type="text/javascript">

var _centerTimer;

for(var i=0;i<10;i=i+1){

if(_centerTimer){

  window.clearTimeout(_centerTimer);

}

_centerTimer=window.setTimeout(function (){

  document.getElementById("aa").innerHTML="i="+i;

},3000);

}

</script>

<p></p>

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<p></p>

window.setTimeout第二种用法：<p></p><div id="bb"></div>

<script type="text/javascript">

function doaa(m){

//document.write("m="+m);

document.getElementById("bb").innerHTML="m="+m;

if(m<100){

  window.setTimeout(function (){

   m=m+1;

   doaa(m);

  },200);

}

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}

doaa(0);

</script>