13-6.txt

开发王代码 代码

<script type="text/javascript" language="javascript">
  <!--
  var AD_left,AD_right;
  //--------------------[02]-----------------------------------------
  //设置div元素的基本CSS样式
  function initAD(){
    AD_left = document.getElementById("AD_left");
    AD_right = document.getElementById("AD_right");
	with(AD_left.style){
	  visibility = "visible";
	  position = "absolute";
	  zIndex = 1;
	}
	with(AD_right.style){
	  visibility = "visible";
	  position = "absolute";
	  zIndex = 1;
	}
    //--------------------[03]-----------------------------------------
    //通过间隔不断执行moveAD函数，我们可以将两个div元素定位在网页两侧
    setTimeout("moveAD(AD_left)", 20);
    setTimeout("moveAD(AD_right)", 20);
  }
  function moveAD(ADName) {
    var x = 5;
    var y = 340;
    var diff = (document.body.scrollTop + y - ADName.style.posTop)*.30;
    var y = document.body.scrollTop + y - diff;
    ADName.style.top = y + "px";
    if(ADName==AD_left){
      ADName.style.left = x + "px";
    }
    if(ADName==AD_right){
    ADName.style.right = x + "px";
    }
  } 
  //--------------------[04]-----------------------------------------
  //关闭广告，其实就是隐藏div元素
  function closeAD(ADName){
    ADName.parentNode.style.visibility='hidden';
  } 
  //--------------------[01]-----------------------------------------
  //首先写出来这四个部分，其实分为左右两个div元素
  document.write("<div id='AD_left'>");
  document.write("<img src='pic/close.gif'onclick='javascript:closeAD(this);void(0);'style='display:block;' />");
  document.write("<img src='pic/ad_left.jpg' />");
  document.write("</div>");
  document.write("<div id='AD_right' style='display:block;right:0px'>");
  document.write("<img src='pic/close.gif'onclick='javascript:closeAD(this);void(0);'style='display:block;' />");
  document.write("<img src='pic/ad_right.jpg' />");
  document.write("</div>");
  initAD();
  -->
</script>