var xPos = 0;
		var yPos = 10;
		img.style.left= xPos;
		img.style.top = yPos;
		var step = 1;
		var delay = 25; 
		var width,height,Hoffset,Woffset;
		var y = 1;
		var x = 0;
		var interval;
		img.visibility = "visible";
		
		function changePos() 
		{
		  width = document.body.clientWidth;   //IE窗口中文档的宽度
		  height = document.body.clientHeight;//IE窗口中文档的高度
		  Hoffset = img.offsetHeight;//得到img对象离文档最上面的距离
		  Woffset = img.offsetWidth;//得到img对象离文档最左面的宽度
		  if (y) 
		  {
		    yPos = yPos + step;
		  }
		  else 
		  {
		    yPos = yPos - step;
		  }
		  
		  if (yPos < 0) 
		  {
		    y = 1;
		    yPos = 0;
		  }
		  if (yPos >= (height - Hoffset)) 
		  {
		    y = 0;
		    yPos = (height - Hoffset);
		  }
			img.style.left = xPos + document.body.scrollLeft;//改变img离窗口左边框的距离        document.body.scrollLeft 窗口左边框X坐标
			img.style.top = yPos + document.body.scrollTop;
			jpkc.style.left = width - 90;//改变img离窗口左边框的距离        document.body.scrollLeft 窗口左边框X坐标
			jpkc.style.top = img.style.top;
	  }

		function start() 
		{
		  interval = setInterval('changePos()', delay);
		}
		
		function pause_resume() 
		{
		    clearInterval(interval);
		}
		start();// JavaScript Document
    	//img.visibility = "hidden";