日期:2014-05-16  浏览次数:20433 次

FF不支持position:relative吗?
看下面的代码,改变style.posTop,posLeft属性,可以以p元素上下移动,在IE和opera里面都工作正常,可是在FF里面一定反应都没有,
什么原因,

代码如下:

<!DOCTYPE   html   PUBLIC   "-//W3C//DTD   HTML   4.01   Transitional//EN "   "http://www.w3.org/TR/html4/loose.dtd ">
<html>
<head>
<meta   http-equiv= "Content-Type "   content= "text/html;   charset=GB18030 ">
<title> Insert   title   here </title>
<style   type= "text/css ">
#a{background-color:red;border:1px   solid   black;position:relative;}
#b{background-color:blue;border:1px   solid   black;}

</style>
</head>
<body>
<p   id= "a "> aaaaaaaaaaaaaaaaa </p> cccc
<p   id= "b "> bbbbbbbbbbbbbbbb </p>
<button   onclick= "down() "> 下移 </button>
</body>
<script   type= "text/javascript ">
function   down(){
  p   =   document.getElementById( "a ");
    //alert(p.style.position);
  //alert(p.style.posTop);
  //alert(p.style.posLeft);
  p.style.posTop   =p.style.posTop   +   10;
    p.style.posLeft   =p.style.posLeft   +   20;

}
</script>
</html>

------解决方案--------------------
请使用
document.getElementByID( "id ").style.left = "123px ";
document.getElementByID( "id ").style.top = "123px ";

另外,一定要加单位 "122px "
------解决方案--------------------
var temp = parseInt(p.style.posTop)+20;
p.style.posTop = temp + "px ";

------解决方案--------------------
var temp = parseInt(p.style.top)+20;
p.style.top = temp + "px ";
temp = parseInt(p.style.left)+20;
p.style.left = temp + "px ";