var show = false;
	function showdiv(o)
	{
	//	if (!show)
		{
			//alert(document.getElementById("tMain").width);
			//alert(document.getElementById("tMain").clientWidth);
			//alert(document.body.clientWidth);
			document.getElementById(o).style.left = (document.body.clientWidth-document.getElementById("tMain").clientWidth)/2 + 85;
			document.getElementById(o).style.top = 168;
			document.getElementById(o).style.display = 'inline';	
			show = true;
		}					
	}
	function showdiv1(o)
	{
	//	if (!show)
		{
			//alert(document.getElementById("tMain").width);
			//alert(document.getElementById("tMain").clientWidth);
			//alert(document.body.clientWidth);
			document.getElementById(o).style.left = (document.body.clientWidth-document.getElementById("tMain").clientWidth)/2 + 85;
			document.getElementById(o).style.top = 195;
			document.getElementById(o).style.display = 'inline';	
			show = true;
		}					
	}
	
	function showdiv2(o)
	{
	//	if (!show)
		{
			//alert(document.getElementById("tMain").width);
			//alert(document.getElementById("tMain").clientWidth);
			//alert(document.body.clientWidth);
			document.getElementById(o).style.left = (document.body.clientWidth-document.getElementById("tMain").clientWidth)/2 + 170;
			document.getElementById(o).style.top = 195;
			document.getElementById(o).style.display = 'inline';	
			show = true;
		}					
	}
	
	function showdiv3(o)
	{
	//	if (!show)
		{
			//alert(document.getElementById("tMain").width);
			//alert(document.getElementById("tMain").clientWidth);
			//alert(document.body.clientWidth);
			document.getElementById(o).style.left = (document.body.clientWidth-document.getElementById("tMain").clientWidth)/2 + 170;
			document.getElementById(o).style.top = 168;
			document.getElementById(o).style.display = 'inline';	
			show = true;
		}					
	}
	
	function HideBwh()
	{
		if (ishide.hide)
		{
			document.getElementById('bzhgldiv').style.display='none';	
			show = false;	
		}				

	}
	function HideBwh1()
	{
		if (ishide.hide)
		{
			document.getElementById('rjfbptdiv').style.display='none';	
			show = false;	
		}				

	}
	function hidediv(o)
	{
		document.getElementById(o).style.display='none';	
		show = false;				
	}
	

/*   
  *target 要固定的元素对象，也可以是元素的id   
  *pos:object/string 指定固定到的位置，类型为 object时，使用json方式如{right:200,bottom:50} ，为string时可选参数如下：   
  *cc,正中间,lc  左边,rc 右边   
  *lt  左上角,ct 上边,rt  右上角   
  *lb 左下角,cb 底部,rb 右下角   
  */   
 var fixPosition=function(target,pos) {  
     this.target= this.g(target);  
     this.pos=pos;  
     this.init();//  
 };  
   
 fixPosition.prototype={  
     isScroll:navigator.userAgent.indexOf("MSIE 6")!=-1 ||(window.ActiveXObject && document.compatMode!="CSS1Compat"),  
     ae:function(e,call) {  
         if(window.addEventListener)  
             window.addEventListener(e,call,false);  
         else  
             window.attachEvent("on"+e,call);  
     },  
     g:function(id) {  
         return typeof(id)=="string"?document.getElementById(id):id;  
     },  
     setPos:function() {// 设置位置  
         var de;  
         if(document.compatMode=="CSS1Compat")de=document.documentElement;  
         else de=document.body;  
           
         if(typeof(this.pos)=="string") {//  
             if(!this.isScroll){  
                 switch(this.pos.charAt(0)) {  
                     case "l":  
                         this.target.style.left="0px";  
                         break;  
                     case "r":  
                         this.target.style.right="0px";  
                         break;  
                     default:  
                         this.target.style.left=(de.clientWidth-this.target.clientWidth)/2 +"px";   
                         break;  
                 }  
                 switch(this.pos.charAt(1)) {  
                     case "t":  
                         this.target.style.top="0px";  
                         break;  
                     case "b":  
                         this.target.style.bottom="0px";  
                         break;  
                     default:  
                         this.target.style.top=(de.clientHeight-this.target.clientHeight)/2 +"px";   
                         break;  
                 }  
             }else {  
                 switch(this.pos.charAt(0)) {  
                     case "l":  
                         this.target.style.left=de.scrollLeft+"px";  
                         break;  
                     case "r":  
                         this.target.style.left=de.scrollLeft+de.clientWidth-this.target.clientWidth +"px";  
                         break;  
                     default:  
                         this.target.style.left=de.scrollLeft+((de.clientWidth-this.target.clientWidth)/2)+"px";  
                         break;  
                 }  
                 switch(this.pos.charAt(1)) {  
                     case "t":  
                         this.target.style.top=de.scrollTop+"px";  
                         break;  
                     case "b":  
                         this.target.style.top=de.scrollTop+de.clientHeight-this.target.clientHeight+"px";  
                         break;  
                     default:  
                         this.target.style.top=de.scrollTop+((de.clientHeight-this.target.clientHeight)/2)+"px";  
                         break;  
                 }  
             }  
         } else {  
             if(!this.isScroll) {  
                 for(var p in this.pos)  
                     this.target.style[p]=this.pos[p]+"px";  
             } else {  
                 for(var p in this.pos) {  
                     switch(p.toLowerCase()) {  
                         case "left":  
                             this.target.style.left=de.scrollLeft+this.pos[p]+"px";  
                             break;  
                         case "right":  
                             this.target.style.left=de.scrollLeft+de.clientWidth-this.target.clientWidth-this.pos[p]+"px";  
                             break;  
                         case "top":  
                             this.target.style.top=de.scrollTop+this.pos[p]+ "px";  
                             break;  
                         case "bottom":  
                             this.target.style.top=de.scrollTop+de.clientHeight-this.target.clientHeight-this.pos[p]+"px";  
                             break;  
                     }  
                 }  
             }  
         }  
     },  
     init:function() {  
         if(!this.pos)  
             throw Error("Invalid arguments [pos].");  
         if(!this.isScroll)  
             this.target.style.position="fixed";  
         else  
             this.target.style.position="absolute";  
         var timer,o=this;  
         this.ae("resize",function() {//支持fixed的浏览器窗体大小改变时也重置位置，防止中间无法居中  
             clearTimeout(timer);  
             timer=setTimeout(function() {  
                 o.setPos();  
             },30);  
         });  
         if(this.isScroll) {//滚动  
             this.ae("scroll",function() {                  
                 clearTimeout(timer);  
                 timer=setTimeout(function() {  
                     o.setPos();  
                 },30);  
             });  
         }  
         this.setPos();  
     }  
 }  
 /* 
  *强烈建议您的页面加上w3c的dtd 
  */