function $_(element){ 
if(arguments.length>1){ 
for(var i=0,elements=[],length=arguments.length;i<length;i++) 
elements.push($_(arguments[i])); 
return elements; 
} 
if(typeof element=="string") 
return document.getElementById(element); 
else 
return element; 
} 
Function.prototype.bind=function(object){ 
var method=this; 
return function(){ 
method.apply(object,arguments); 
} 
} 
var Class={ 
create:function(){ 
return function(){ 
this.initialize.apply(this,arguments); 
} 
} 
} 
Object.extend=function(destination,resource){ 
for(var property in resource){ 
destination[property]=resource[property]; 
} 
return destination; 
} 
//对联广告类 
var float_ad=Class.create(); 
float_ad.prototype={ 
initialize:function(id,content,top,left,width){ 
document.write('<div id='+id+' style="position:absolute;">'+content+'</div>'); 
this.id=$_(id); 
this.top=top; 
if(!!left){ 
this.id.style.left="8px"; 
}else{ 
this.id.style.left=(document.documentElement.clientWidth-width-8)+"px"; 
window.onresize=function(){ 
this.id.style.left=(document.documentElement.clientWidth-width-8)+"px"; 
}.bind(this); 
} 
this.id.style.top=top+"px"; 
this.interId=setInterval(this.scroll.bind(this),20); 
}, 
scroll:function(){ 
this.stmnStartPoint = parseInt(this.id.style.top, 10); 
this.stmnEndPoint =document.documentElement.scrollTop+ this.top; 
if(navigator.userAgent.indexOf("Chrome")>0){ 
this.stmnEndPoint=document.body.scrollTop+this.top; 
} 
if ( this.stmnStartPoint != this.stmnEndPoint ) { 
this.stmnScrollAmount = Math.ceil( Math.abs( this.stmnEndPoint - this.stmnStartPoint ) / 15 ); 
this.id.style.top = parseInt(this.id.style.top, 10) + ( ( this.stmnEndPoint<this.stmnStartPoint ) ? -this.stmnScrollAmount : this.stmnScrollAmount )+"px"; 
} 
} 
} 
//漂浮广告类 
var move_ad=Class.create();
move_ad.prototype = {
    initialize: function(imgOption, initPosition, delay) {
    this.imgOptions = Object.extend({ url: "", link: "", alt: "", width: "120px", height: "120px" }, imgOption || {});
        this.adPosition = Object.extend({ left: 40, top: 120 }, initPosition || {});
        this.delay = delay;
        this.step = 1;
        
        this.herizonFlag = Math.random()>0.5?true:false;
        this.verticleFlag = Math.random() > 0.5 ? true : false;
        this.id = "ad_move_sg" + imgOption.url;
        var vHtmlString = "<div id='" + this.id + "' style='position:absolute; left:" + this.adPosition.left + "px; top:" + this.adPosition.top + "px; width:" + this.imgOptions.width + ";";
        vHtmlString += " height:" + this.imgOptions.height + "; z-index:10;'><a href='" + this.imgOptions.link + "' target='_blank' title='" + this.imgOptions.alt + "'><img src='" + this.imgOptions.url + "'style='border:none; width:" + this.imgOptions.width + ";height:" + this.imgOptions.height + "' alt='" + this.imgOptions.alt + "' /></a></div>";
        document.write(vHtmlString);
        this.id = $_(this.id);
        this.intervalId = setInterval(this.scroll.bind(this), this.delay);
        this.id.onmouseover = this.stop.bind(this);
        this.id.onmouseout = this.start.bind(this);
    },
    scroll: function() {
        var L = T = 0;
        var B = document.documentElement.clientHeight - this.id.offsetHeight;
        var R = document.documentElement.clientWidth - this.id.offsetWidth;
        this.id.style.left = this.adPosition.left + document.documentElement.scrollLeft + "px";
        this.id.style.top = this.adPosition.top + document.documentElement.scrollTop + "px";
        this.adPosition.left = this.adPosition.left + this.step * (this.herizonFlag ? 1 : -1-Math.random());
        if (this.adPosition.left < L) { this.herizonFlag = true; this.adPosition.left = L; }
        if (this.adPosition.left > R) { this.herizonFlag = false; this.adPosition.left = R; }
        this.adPosition.top = this.adPosition.top + this.step * (this.verticleFlag ? 1 : -1-Math.random());
        if (this.adPosition.top <= T) { this.verticleFlag = true; this.adPosition.top = T; }
        if (this.adPosition.top >= B) { this.verticleFlag = false; this.adPosition.top = B; }
    },
    stop: function() {
        clearInterval(this.intervalId);
    },
    start: function() {
        this.intervalId = setInterval(this.scroll.bind(this), this.delay);
    }
} 
//内容自定义漂浮广告类 
var move_ad_custom=Class.create(); 
move_ad_custom.prototype={ 
initialize:function(imgOption,initPosition,delay){ 
this.imgOptions=Object.extend({Content:"",Id:"",width:120,height:120},imgOption||{}); 
this.adPosition=Object.extend({left:40,top:120},initPosition||{}); 
this.delay =delay; 
this.step = 1; 
this.herizonFlag=true; 
this.verticleFlag=true; 
this.id="ad_move_sg_"+this.imgOptions.Id; 
var vHtmlString="<div id='"+this.id+"' style='position:absolute; left:"+this.adPosition.left+"px; top:"+this.adPosition.top+"px; width:"+this.imgOptions.width+"px;"; 
vHtmlString+=" height:"+this.imgOptions.height+"px; z-index:10;'>"+this.imgOptions.Content+"</div>"; 
document.write(vHtmlString); 
this.id=$_(this.id); 
this.intervalId=setInterval(this.scroll.bind(this),this.delay); 
this.id.onmouseover=this.stop.bind(this); 
this.id.onmouseout=this.start.bind(this); 
}, 
scroll:function(){ 
var L=T=0; 
var B=document.documentElement.clientHeight-this.id.offsetHeight; 
var R=document.documentElement.clientWidth-this.id.offsetWidth; 
this.id.style.left=this.adPosition.left+document.documentElement.scrollLeft+"px"; 
this.id.style.top=this.adPosition.top+document.documentElement.scrollTop+"px"; 
this.adPosition.left =this.adPosition.left + this.step*(this.herizonFlag?1:-1); 
if (this.adPosition.left < L) { this.herizonFlag = true; this.adPosition.left = L;} 
if (this.adPosition.left > R){ this.herizonFlag = false; this.adPosition.left = R;} 
this.adPosition.top =this.adPosition.top + this.step*(this.verticleFlag?1:-1); 
if(this.adPosition.top <= T){ this.verticleFlag=true; this.adPosition.top=T;} 
if(this.adPosition.top >= B){ this.verticleFlag=false; this.adPosition.top=B; } 
}, 
stop:function(){ 
clearInterval(this.intervalId); 
}, 
start:function(){ 
this.intervalId=setInterval(this.scroll.bind(this),this.delay); 
} 
}