// JavaScript Document
 function vMiddle(){
    var middleDiv=document.getElementById("wrap");
    var divHeight=middleDiv.offsetHeight;
    var bodyHeight=document.body.offsetHeight ;
    if(bodyHeight>divHeight)
      middleDiv.style.marginTop=-divHeight/2+"px";
   else{
      middleDiv.style.marginTop=0;
      middleDiv.style.top=0;
    }
}




 function aa()
 {
       var arr=new Array('../images/1024bg.jpg','../images/1024bg1.jpg','../images/1024bg2.jpg','../images/1024bg3.jpg','../images/1024bg4.jpg','../images/1024bg5.jpg','../images/1024bg6.jpg','../images/1024bg7.jpg','../images/1024bg8.jpg','../images/1024bg9.jpg','../images/1024bg10.jpg');
   
   if(window.screen.availWidth==800 || window.screen.availWidth==1024 || window.screen.availWidth==1152)
   {
   
    var index=Math.floor(Math.random()*arr.length);
   
    if(index==0)
    {
     document.write("<BODY BACKGROUND="+arr[0]+">");
    }
    else if(index==1)
    {
     document.write("<BODY BACKGROUND="+arr[1]+">");
    }
    else if(index==2)
    {
     document.write("<BODY BACKGROUND="+arr[2]+">");
    }
	else if(index==3)
    {
     document.write("<BODY BACKGROUND="+arr[3]+">");
    }
	else if(index==4)
    {
     document.write("<BODY BACKGROUND="+arr[4]+">");
    }
	else if(index==5)
    {
     document.write("<BODY BACKGROUND="+arr[5]+">");
    }
	else if(index==6)
    {
     document.write("<BODY BACKGROUND="+arr[6]+">");
    }
	else if(index==7)
    {
     document.write("<BODY BACKGROUND="+arr[7]+">");
    }
	else if(index==8)
    {
     document.write("<BODY BACKGROUND="+arr[8]+">");
    }
	else if(index==9)
    {
     document.write("<BODY BACKGROUND="+arr[9]+">");
    }
	else if(index==10)
    {
     document.write("<BODY BACKGROUND="+arr[10]+">");
    }
   }          
  }
  
 function bb()
 {
       var arr=new Array('../images/1280bg.jpg','../images/1280bg1.jpg','../images/1280bg2.jpg','../images/1280bg3.jpg','../images/1280bg4.jpg','../images/1280bg5.jpg','../images/1280bg6.jpg','../images/1280bg7.jpg','../images/1280bg8.jpg','../images/1280bg9.jpg','../images/1280bg10.jpg');
   
   if(window.screen.availWidth==1280 || window.screen.availWidth==1400 || window.screen.availWidth==1366 || window.screen.availWidth==1440)
   {
   
    var index=Math.floor(Math.random()*arr.length);
   
    if(index==0)
    {
     document.write("<BODY BACKGROUND="+arr[0]+">");
    }
    else if(index==1)
    {
     document.write("<BODY BACKGROUND="+arr[1]+">");
    }
    else if(index==2)
    {
     document.write("<BODY BACKGROUND="+arr[2]+">");
    }
	else if(index==3)
    {
     document.write("<BODY BACKGROUND="+arr[3]+">");
    }
	else if(index==4)
    {
     document.write("<BODY BACKGROUND="+arr[4]+">");
    }
	else if(index==5)
    {
     document.write("<BODY BACKGROUND="+arr[5]+">");
    }
	else if(index==6)
    {
     document.write("<BODY BACKGROUND="+arr[6]+">");
    }
	else if(index==7)
    {
     document.write("<BODY BACKGROUND="+arr[7]+">");
    }
	else if(index==8)
    {
     document.write("<BODY BACKGROUND="+arr[8]+">");
    }
	else if(index==9)
    {
     document.write("<BODY BACKGROUND="+arr[9]+">");
    }
	else if(index==10)
    {
     document.write("<BODY BACKGROUND="+arr[10]+">");
    }
   }          
  }
   function cc()
 {
       var arr=new Array('../images/1600bg.jpg','../images/1600bg1.jpg','../images/1600bg2.jpg','../images/1600bg3.jpg','../images/1600bg4.jpg','../images/1600bg5.jpg','../images/1600bg6.jpg','../images/1600bg7.jpg','../images/1600bg8.jpg','../images/1600bg9.jpg','../images/1600bg10.jpg');
   
   if(window.screen.availWidth==1600 || window.screen.availWidth==1680 || window.screen.availWidth==1792 || window.screen.availWidth==1856)
   {
   
    var index=Math.floor(Math.random()*arr.length);
   
    if(index==0)
    {
         document.write("<BODY BACKGROUND="+arr[0]+">");
    }
    else if(index==1)
    {
     document.write("<BODY BACKGROUND="+arr[1]+">");
    }
    else if(index==2)
    {
     document.write("<BODY BACKGROUND="+arr[2]+">");
    }
	else if(index==3)
    {
     document.write("<BODY BACKGROUND="+arr[3]+">");
    }
	else if(index==4)
    {
     document.write("<BODY BACKGROUND="+arr[4]+">");
    }
	else if(index==5)
    {
     document.write("<BODY BACKGROUND="+arr[5]+">");
    }
	else if(index==6)
    {
     document.write("<BODY BACKGROUND="+arr[6]+">");
    }
	else if(index==7)
    {
     document.write("<BODY BACKGROUND="+arr[7]+">");
    }
	else if(index==8)
    {
     document.write("<BODY BACKGROUND="+arr[8]+">");
    }
	else if(index==9)
    {
     document.write("<BODY BACKGROUND="+arr[9]+">");
    }
	else if(index==10)
    {
     document.write("<BODY BACKGROUND="+arr[10]+">");
    }
   }          
  }
   function dd()
 {
       var arr=new Array('../images/1600bg.jpg','../images/1600bg1.jpg','../images/1600bg2.jpg','../images/1600bg3.jpg','../images/1600bg4.jpg','../images/1600bg5.jpg','../images/1600bg6.jpg','../images/1600bg7.jpg','../images/1600bg8.jpg','../images/1600bg9.jpg','../images/1600bg10.jpg');
   
   if(window.screen.availWidth==1920 || window.screen.availWidth==2048 || window.screen.availWidth==2560)
   {
   
    var index=Math.floor(Math.random()*arr.length);
   
    if(index==0)
    {
     document.write("<BODY BACKGROUND="+arr[0]+">");
    }
    else if(index==1)
    {
     document.write("<BODY BACKGROUND="+arr[1]+">");
    }
    else if(index==2)
    {
     document.write("<BODY BACKGROUND="+arr[2]+">");
    }
	else if(index==3)
    {
     document.write("<BODY BACKGROUND="+arr[3]+">");
    }
	else if(index==4)
    {
     document.write("<BODY BACKGROUND="+arr[4]+">");
    }
	else if(index==5)
    {
     document.write("<BODY BACKGROUND="+arr[5]+">");
    }
	else if(index==6)
    {
     document.write("<BODY BACKGROUND="+arr[6]+">");
    }
	else if(index==7)
    {
     document.write("<BODY BACKGROUND="+arr[7]+">");
    }
	else if(index==8)
    {
     document.write("<BODY BACKGROUND="+arr[8]+">");
    }
	else if(index==9)
    {
     document.write("<BODY BACKGROUND="+arr[9]+">");
    }
	else if(index==10)
    {
     document.write("<BODY BACKGROUND="+arr[10]+">");
    }
   }          
  }
  function runFun()
  {
  		if(window.screen.availWidth==1920 || window.screen.availWidth==2048 || window.screen.availWidth==2560)
		{
			document.onload=dd();
		}
  		if(window.screen.availWidth==1600 || window.screen.availWidth==1680 || window.screen.availWidth==1792 || window.screen.availWidth==1856)
		{
			document.onload=cc();
		}
  		if(window.screen.availWidth==1280 || window.screen.availWidth==1400 || window.screen.availWidth==1366 || window.screen.availWidth==1440)
		{
			document.onload=bb();
		}
		if(window.screen.availWidth==800 || window.screen.availWidth==1024 || window.screen.availWidth==1152)
		{
			document.onload=aa();
		}
  }
   	document.onload=runFun();







<!--   
//公共脚本文件 main.js   
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;   
}   
//广告脚本文件 AdMove.js   
/*  
例子  
<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 = 25;//移动速度   
        interval=setInterval(obj.CustomMethod,delay);   
        obj.onmouseover=function(){clearInterval(interval);}   
        obj.onmouseout=function(){interval=setInterval(obj.CustomMethod, delay);}   
    }   
}   
//-->   