var xPos = 300;
var yPos = 200; 
var step = 1;
var delay = 30; 
var height = 0;
var Hoffset = 0;
var Woffset = 0;
var yon = 0;
var xon = 0;
var pause = true;
var interval;

function changePos() 
{
	width = document.documentElement.clientWidth;
	height = document.documentElement.clientHeight;
	Hoffset = img1.offsetHeight;
	Woffset = img1.offsetWidth;
	img1.style.left = xPos + document.documentElement.scrollLeft;
	img1.style.top = yPos + document.documentElement.scrollTop;
	if (yon) 
		{yPos = yPos + step;}
	else 
		{yPos = yPos - step;}
	if (yPos < 0) 
		{yon = 1;yPos = 0;}
	if (yPos >= (height - Hoffset)) 
		{yon = 0;yPos = (height - Hoffset);}
	if (xon) 
		{xPos = xPos + step;}
	else 
		{xPos = xPos - step;}
	if (xPos < 0) 
		{xon = 1;xPos = 0;}
	if (xPos >= (width - Woffset)) 
		{xon = 0;xPos = (width - Woffset);   }
	}
	
	function start()
	 {
	 	img1.visibility = "visible";
		interval = setInterval('changePos()', delay);
	}
	function pause_resume() 
	{
		if(pause) 
		{
			clearInterval(interval);
			pause = false;}
		else 
		{
			interval = setInterval('changePos()',delay);
			pause = true; 
			}
		}

		//document.write("<div id=\"img1\" style=\"Z-INDEX: 100; LEFT: 2px; WIDTH: 110px; POSITION: absolute; TOP: 43px; HEIGHT: 80px;visibility: visible;\"><a href=\"http://www.zhoushan.cn/rdzz/gjjhhzhkf/\" target=\"_blank\"><img src=\"images/zhoushan.jpg\" border=\"0\" /></a></div>")  ÐÂÖÛɽ

		$(document).ready(function () {
		  //  $("#index_main").append("<div id=\"img1\" style=\"Z-INDEX: 100; LEFT: 2px; WIDTH: 149px; POSITION: absolute; TOP: 43px; HEIGHT: 112px;visibility: visible;\"><a href=\"http://www.ptblr.gov.cn/vote.aspx?vtype=2\" target=\"_blank\"><img src=\"images/mzpy_dcwj.jpg\" border=\"0\" /></a></div>");
		   // img1.style.top = yPos;
		  //  start();
		});