The effect of couplet advertising code

couplet | advertising

[General effect]
Now a lot of website advertising to do in full swing, now I would like to introduce the common couplet floating advertising effect of the code use method, introduced this effect, in the 1024*768 resolution of the normal display, in the 800*600 resolution can automatically hide, so as not to cover the page affect visitors browsing content, Here is the code needed to implement the effect:

   var delta=0.015
   var collection;
   function Floaters () {
       this.items    = [];
       this.additem    = function (id,x,y,content)
                  {
                    document.write (' < DIV id= ' +id+ ' style= ' z-index:0; position:absolute;  width:80px; Height:60px;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 ()


       {


if (screen.width&lt;=800)


           {


for (var i=0;i&lt;collection.length;i++)


               {


collection[i].object.style.display = ' none ';


               }


Return


           }


for (var i=0;i&lt;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));