/*
*   把body替换成documentElement 可兼容w3c标准
*
*/

//对联广告
var delta=0.08
var collection;
function floaters() {
this.items	= [];
this.addItem	= function(id,type,y,content)//id:divid，type种类：1为右边2为左边，y：距离顶端高度，content：显示内容
		  {
			document.write('<DIV id='+id+' style="Z-INDEX: 10; POSITION: absolute; left:'+(typeof(x)=='string'?eval(x):x)+';top:'+(typeof(y)=='string'?eval(y):y)+'"><div>'+content+'</div><div style=\"font-size:12px; font-family:宋体; color:#999; text-align:right; cursor:pointer; \" onClick=\"this.parentNode.style.display=\'none\';\">&times;关闭</div></DIV>');
			
			var newItem				= {};
			newItem.object			= document.getElementById(id);
			newItem.x				= (type==1?(document.documentElement.clientWidth-newItem.object.offsetWidth-6):6);
			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.documentElement.scrollLeft+followObj_x)) {
			var dx=(document.documentElement.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.documentElement.scrollTop+followObj_y)) {
			var dy=(document.documentElement.scrollTop+followObj_y-followObj.offsetTop)*delta;
			dy=(dy>0?1:-1)*Math.ceil(Math.abs(dy));
			followObj.style.top=followObj.offsetTop+dy;
			}
	}
}
function coupletAd(content1,content2){
    var theFloaters		= new floaters();
    if(content2==null||content2==""){
        content2=content1;
    }
    //右面
    theFloaters.addItem('followDiv1',1,80,content2);
    //左面
    theFloaters.addItem('followDiv2',2,80,content1);
    theFloaters.play();
}

	
//漂浮广告
var x = 50,y = 60 ;
var xin = true, yin = true ;
var step = 1 ;
var delay = 10 ;
var obj;
function floatingAd(id,content){
    document.write("<div id='"+id+"' style='position:absolute'><div>"+content+"</div><div style=\"font-size:12px; font-family:宋体; color:#999; text-align:right; cursor:pointer; \" onClick=\"this.parentNode.style.display=\'none\';\">&times;关闭</div></div>");
    obj=document.getElementById(id) ;
    var itl= setInterval("float()", delay) ;
    obj.onmouseover=function(){clearInterval(itl)} 
    obj.onmouseout=function(){itl=setInterval("float()", delay)}
}
function float() { 
    var L=T=0;
    var R= document.documentElement.clientWidth-obj.offsetWidth ;
    var B = document.documentElement.clientHeight-obj.offsetHeight ;
    obj.style.left = x + document.documentElement.scrollLeft ;
    obj.style.top = y + document.documentElement.scrollTop ;
    x = x + step*(xin?1:-1) ;
    if (x < L) { xin = true; x = L} 
    if (x > R){ xin = false; x = R} 
    y = y + step*(yin?1:-1) 
    if (y < T) { yin = true; y = T } 
    if (y > B) { yin = false; y = B } 
}

//顶部广告伸缩
function changeBannerHeight(){
    obj=document.getElementById("topBanner");
	var bannerHeight=obj.offsetHeight;
    if(bannerHeight-5>0){
        obj.style.height=bannerHeight-5;
		setTimeout("changeBannerHeight()",1);
    }else{
   		obj.style.display="none";
	}
}
//调用伸缩的方法
function startBanner(){
//    obj=document.getElementById("topBanner");
//    if(obj.style.display=="none"){
//		obj.style.display="";
//	}
    setTimeout("changeBannerHeight()",5000);
}