function addevent(obj,evttype,func,cap){
    cap=cap||false;
if(obj.addeventlistener){
     obj.addeventlistener(evttype,func,cap);
   return true;
}else if(obj.attachevent){
        if(cap){
         obj.setcapture();
         return true;
     }else{
      return obj.attachevent("on" + evttype,func);
   }
}else{
   return false;
    }
}
function getpagescroll(){
    var xscroll,yscroll;
if (self.pagexoffset) {
   xscroll = self.pagexoffset;
} else if (document.documentelement && document.documentelement.scrollleft){
   xscroll = document.documentelement.scrollleft;
} else if (document.body) {
   xscroll = document.body.scrollleft;
}
if (self.pageyoffset) {
   yscroll = self.pageyoffset;
} else if (document.documentelement && document.documentelement.scrolltop){
   yscroll = document.documentelement.scrolltop;
} else if (document.body) {
   yscroll = document.body.scrolltop;
}
arraypagescroll = new array(xscroll,yscroll);
return arraypagescroll;
}
function getpagesize(){
    var xscroll, yscroll;
    if (window.innerheight && window.scrollmaxy) { 
        xscroll = document.body.scrollwidth;
        yscroll = window.innerheight + window.scrollmaxy;
    } else if (document.body.scrollheight > document.body.offsetheight){
        xscroll = document.body.scrollwidth;
        yscroll = document.body.scrollheight;
    } else {
        xscroll = document.body.offsetwidth;
        yscroll = document.body.offsetheight;
    }
    var windowwidth, windowheight;
    if (self.innerheight) {
        windowwidth = self.innerwidth;
        windowheight = self.innerheight;
    } else if (document.documentelement && document.documentelement.clientheight) {
        windowwidth = document.documentelement.clientwidth;
        windowheight = document.documentelement.clientheight;
    } else if (document.body) {
        windowwidth = document.body.clientwidth;
        windowheight = document.body.clientheight;
    } 
    if(yscroll < windowheight){
        pageheight = windowheight;
    } else { 
        pageheight = yscroll;
    }
    if(xscroll < windowwidth){ 
        pagewidth = windowwidth;
    } else {
        pagewidth = xscroll;
    }
    arraypagesize = new array(pagewidth,pageheight,windowwidth,windowheight) 
    return arraypagesize;
}
//���ű��ļ� admove.js
/*
����
<div id="div2">
    ***** content ******
</div>
var ad=new admove("div2");
ad.run();
*/
////////////////////////////////////////////////////////
var admoveconfig=new object();
admoveconfig.isinitialized=false;
admoveconfig.scrollx=0;
admoveconfig.scrolly=0;
admoveconfig.movewidth=0;
admoveconfig.moveheight=0;
admoveconfig.resize=function(){
    var winsize=getpagesize();
    admoveconfig.movewidth=winsize[2];
    admoveconfig.moveheight=winsize[3];
    admoveconfig.scroll();
}
admoveconfig.scroll=function(){
    var winscroll=getpagescroll();
    admoveconfig.scrollx=winscroll[0];
    admoveconfig.scrolly=winscroll[1];
}
addevent(window,"resize",admoveconfig.resize);
addevent(window,"scroll",admoveconfig.scroll);
function admove(id){
    if(!admoveconfig.isinitialized){
        admoveconfig.resize();
        admoveconfig.isinitialized=true;
    }
    var obj=document.getelementbyid(id);
    obj.style.position="absolute";
    var w=admoveconfig.movewidth-obj.offsetwidth;
    var h=admoveconfig.moveheight-obj.offsetheight;
    var x = w*math.random(),y = h*math.random();
    var rad=(math.random()+1)*math.pi/6;
    var kx=math.sin(rad),ky=math.cos(rad);
    var dirx = (math.random()<0.5?1:-1), diry = (math.random()<0.5?1:-1);
    var step = 1;
    var interval;
    this.setlocation=function(vx,vy){x=vx;y=vy;}
    this.setdirection=function(vx,vy){dirx=vx;diry=vy;}
    obj.custommethod=function(){
        obj.style.left = (x + admoveconfig.scrollx) + "px";
        obj.style.top = (y + admoveconfig.scrolly) + "px";
        rad=(math.random()+1)*math.pi/6;
        w=admoveconfig.movewidth-obj.offsetwidth;
        h=admoveconfig.moveheight-obj.offsetheight;
        x = x + step*kx*dirx;
        if (x < 0){dirx = 1;x = 0;kx=math.sin(rad);ky=math.cos(rad);} 
        if (x > w){dirx = -1;x = w;kx=math.sin(rad);ky=math.cos(rad);}
        y = y + step*ky*diry;
        if (y < 0){diry = 1;y = 0;kx=math.sin(rad);ky=math.cos(rad);} 
        if (y > h){diry = -1;y = h;kx=math.sin(rad);ky=math.cos(rad);}
    }
    this.run=function(){
        var delay = 10;
        interval=setinterval(obj.custommethod,delay);
        obj.onmouseover=function(){clearinterval(interval);}
        obj.onmouseout=function(){interval=setinterval(obj.custommethod, delay);}
    }
}