function fnCreate(src){
		
			/* 要创建的div的classname */
			var ClassName = "thumbviewbox";
		
			if(src == '')
			{
				return false;
			}
			
			/* 优先创建图片，如果图片没有加载成功，回调自己 */
			var img = document.createElement('img');
			img.setAttribute('src',src);
			var imgwd = img.width;
			var imghg = img.height;
			
			if(imgwd<1)
			{
				var timer = setTimeout("fnCreate('"+src+"')",100);
				return false;
			}else{
				clearInterval(timer);
			}
			
			/* 清除已经弹出的窗口，防止冒泡 */	
			em = document.getElementsByClassName(ClassName)
			
			for(var i=em.length-1; i>=0; i--){
				var p = em[i];
				p.parentNode.removeChild(p);
			}	
			
			/* 各项参数 */
			var htmlWidth = window.innerWidth;			//可见区域宽度
			var htmlHeight = window.innerHeight;		//可见区域高度
			var divleft = 0;							//将要创建的div的左边距
			var divtop =0;								//将要创建的div的右边距
			var closefunction = 'em=document.getElementsByClassName("'+ClassName+'");for(var i=em.length-1;i>=0;i--){var p=em[i];p.parentNode.removeChild(p);}';	//关闭div的代码
			
			img.setAttribute('onclick',closefunction);
			
			/* 计算通过图片计算div应该在的位置，保证弹窗在页面中央 */
			if(imgwd>htmlWidth*0.8)
			{
				img.setAttribute('width',htmlWidth*0.8);
				divleft=htmlWidth*0.1;
				if(imghg>htmlHeight*0.8)
				{
					divtop = htmlHeight*0.1;
				}else{
					divtop = (htmlHeight-imgwd)/2;
				}
			}else{
				img.setAttribute('width',imgwd);
				divleft= (htmlWidth-imgwd)/2;
				if(imghg>htmlHeight*0.8)
				{
					divtop = htmlHeight*0.1;
				}
				else
				{
					divtop = (htmlHeight-imgwd)/2;
				}
			}
	
			/* 创建关闭按钮 */
			var closebtn = document.createElement('a');
			closebtn.setAttribute('class','close');
			closebtn.setAttribute('href','javascript:;');
			closebtn.setAttribute('style','position:absolute;top:-20px;right:-5px;cursor:pointer;background:#444;color:#FFF;');
			closebtn.innerHTML = '[close/关闭]';
			closebtn.setAttribute('onclick',closefunction);
			
			/* 创建弹窗 */
			var element = document.createElement('div');
			element.appendChild(img);
			element.appendChild(closebtn);
			element.setAttribute('class',ClassName);
			element.setAttribute('style','border:5px solid #444;position:absolute;top:'+Math.round(divtop)+'px;left:'+Math.round(divleft)+'px;border-radius:5px;background:#FFF');
				
			document.body.appendChild(element);
	}