浮动广告通用JS做法

最新推荐文章于 2025-05-08 14:55:44 发布

转载最新推荐文章于 2025-05-08 14:55:44 发布 · 586 阅读

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#function #string #border #iframe #div

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本文介绍了一种使用JavaScript实现的网页元素跟随滚动效果的方法。通过动态调整元素的位置，使得这些元素可以随着用户的滚动而平滑移动。文章提供了具体的代码实现细节，并展示了如何创建和播放这些跟随滚动的元素。

var delta=0.15
var collection;
function floaters() {
this.items = [];
this.addItem = function(id,x,y,content)
      {
     document.write('<DIV id='+id+' style="Z-INDEX: 10; POSITION: absolute; width:100px; height:450px;left:'+(typeof(x)=='string'?eval(x):x)+';top:'+(typeof(y)=='string'?eval(y):y)+'">'+content+'</DIV>');

     var newItem    = {};
     newItem.object   = document.getElementById(id);
     newItem.x    = x;
     newItem.y    = y;

     this.items[this.items.length] = newItem;
      }
this.play = function()
      {
     collection    = this.items
     setInterval('play()',10);
      }
}
function play()
{

   for(var i=0;i<collection.length;i++)
   {
    var followObj = collection[i].object;
    var followObj_x = (typeof(collection[i].x)=='string'?eval(collection[i].x):collection[i].x);
    var followObj_y = (typeof(collection[i].y)=='string'?eval(collection[i].y):collection[i].y);

    if(followObj.offsetLeft!=(document.body.scrollLeft+followObj_x)) {
     var dx=(document.body.scrollLeft+followObj_x-followObj.offsetLeft)*delta;
     dx=(dx>0?1:-1)*Math.ceil(Math.abs(dx));
     followObj.style.left=followObj.offsetLeft+dx;
     }

    if(followObj.offsetTop!=(document.body.scrollTop+followObj_y)) {
     var dy=(document.body.scrollTop+followObj_y-followObj.offsetTop)*delta;
     dy=(dy>0?1:-1)*Math.ceil(Math.abs(dy));
     followObj.style.top=followObj.offsetTop+dy;
     }
    followObj.style.display = '';
   }
}

var theFloaters = new floaters();
theFloaters.addItem('followDiv1','document.body.clientWidth-200',10,'<iframe src=/"/images/2006lh/pop.htm/" width=/"187/" height=/"580/" frameborder=/"no/" border=/"0/" marginwidth=/"0/" marginheight=/"0/" scrolling=/"no/"></iframe>');
theFloaters.play();

多个:

//左边
var left_img = "<a target='_blank' href='http://www.youkuaiyun.com/subject/summerjobs/'><img border='0' src='Images.hr/shuqimingqi.GIF' width='80' height='80' /></a><br /><br /><a target='_blank' href='http://news.youkuaiyun.com/news/newstopic/25/25214.shtml'><img border='0' src='Images.hr/zhichangzhuanjia.GIF' width='80' height='80' /></a>";
//右边
var right_img = "<a target='_blank' href='#'><img border='0' src='null.gif' width='80' height='80' /></a><br /><br /><a target='_blank' href='#'><img border='0' src='null.gif' width='80' height='80' /></a>";

var delta = 0.05;
var collection;