JavaScript 和 jQuery 设置悬浮广告

jqueryvar $a1Top;var $a1Obj;$(document).ready(function(){$a1Top=$("#ad1").css("top");});$(window).scroll(function(){$("#ad1").css("top", parseInt($a1Top)+$(window).scrollTop());});JSvar a1Top;var a1Obj;function inix(){//获取a1Top的高度a1Obj=document.getElementById("ad1");if(a1Obj.currentStyle){a1Top=parseInt(a1Obj.currentStyle.top);}else{a1Top=parseInt(a1Obj.getComputedStyle(a1obj,null).top);}}function move(){a1Obj.style.top=a1Top+parseInt(document.documentElement.scrollTop)+"px";}window.onload=inix;window.onscroll=move;

 

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