/*@author:wsky*/

function initAD(id,img,url,title,l,t){
	var divLeft=l;//设置广告块初始左边位置 
	var divTop=t;//设置广告块初始顶部位置 
	var divWidth=120;//设置广告块宽度 
	var divHeight=120;//设置广告块高度 
	var divImg=img;//设置广告图片的URL地址 
	var divUrl=url;//设置广告链接 
	var divTitle=title; 
	
	var el=document.createElement('div');
	var html="<DIV id="+id+" style='position:absolute; left:"+divLeft+"px; top:"+divTop+"px; width:"+divWidth+"px; height:"+divHeight+"px; z-index:1000;' >" 
	+"<a target='_blank' href='"+divUrl+"'><img src='"+divImg+"' border='0' alt='"+divTitle+"' style='width:"+divWidth+"px; height:"+divHeight+"px;'></a></DIV>";
	el.innerHTML=html;
	document.body.appendChild(el);
	
}
 

var _stepx1=2;
var _stepy1=2;//初始化每次偏离的象素 	

function moveAd1(o){//飘浮广告主函数 
	
	var adLeft=parseInt(o.style.left); 
	var adTop=parseInt(o.style.top); 
	var adWidth=parseInt(o.style.width); 
	var adHeight=parseInt(o.style.height);
	 
	var _bodyLeft=document.body.scrollLeft; 
	var _bodyTop=document.body.scrollTop; 
	var _bodyHeight=document.body.clientHeight+_bodyTop; 
	var _bodyWidth=document.body.clientWidth+_bodyLeft; 
	
	if(adLeft<=_bodyLeft){ 
		_stepx1=2; 
	} 
	if(adTop<=_bodyTop){ 
		_stepy1=2; 
	} 
	if((adLeft+adWidth)>=_bodyWidth){ 
		_stepx1=-2 
	} 
	if((adTop+adHeight)>=_bodyHeight){ 
		_stepy1=-2 
	} 
	
	o.style.left=adLeft+_stepx1; 
	o.style.top=adTop+_stepy1; 
} 

var _stepx2=2;
var _stepy2=2;//初始化每次偏离的象素
function moveAd2(o){//飘浮广告主函数 
	
	var adLeft=parseInt(o.style.left); 
	var adTop=parseInt(o.style.top); 
	var adWidth=parseInt(o.style.width); 
	var adHeight=parseInt(o.style.height);
	 
	var _bodyLeft=document.body.scrollLeft; 
	var _bodyTop=document.body.scrollTop; 
	var _bodyHeight=document.body.clientHeight+_bodyTop; 
	var _bodyWidth=document.body.clientWidth+_bodyLeft; 
	
	if(adLeft<=_bodyLeft){ 
		_stepx2=2; 
	} 
	if(adTop<=_bodyTop){ 
		_stepy2=2; 
	} 
	if((adLeft+adWidth)>=_bodyWidth){ 
		_stepx2=-2 
	} 
	if((adTop+adHeight)>=_bodyHeight){ 
		_stepy2=-2 
	} 
	
	o.style.left=adLeft+_stepx2; 
	o.style.top=adTop+_stepy2; 
} 



var timerId1;
var timerId2;
var moveSpeed=40;//速度

function beginMoveAd1(){//启动飘浮 
	timerId1=setInterval(
		function(){
			moveAd1(document.getElementById('ad1'));	
		}
	,moveSpeed);
}
function beginMoveAd2(){//启动飘浮 
	timerId2=setInterval(
		function(){
			moveAd2(document.getElementById('ad2'));	
		}
	,moveSpeed);
}