<!-- Begin
//more javascript from http://www.foshanhotel.com
var xPos = 300;			// 起始横向位置(从左算起，单位象素)
var yPos = document.body.clientHeight;	// 页面本身高度
var step = 1; 
var delay = 20; 			// 速度，值越大速度越慢
var height = 0;
var Hoffset = 0;
var Woffset = 0;
var yon = 0;
var xon = 0;
var pause = true;
var interval;
img_ads.style.top = yPos;
function changePos() {
  width = document.body.clientWidth;		// 判断浏览器窗口的宽度
  height = document.body.clientHeight; 	// 判断浏览器窗口的高度
  Hoffset = img_ads.offsetHeight;
  Woffset = img_ads.offsetWidth;
  img_ads.style.left = xPos + document.body.scrollLeft;
  img_ads.style.top = yPos + document.body.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() {
  img_ads.visibility = "visible";
  interval = setInterval('changePos()', delay);
}
function pause_resume() {
  if(pause) {clearInterval(interval);pause = false;}
  else {interval = setInterval('changePos()',delay);pause = true;}
}
function closead(){
img_ads.style.display = "none";
}
start();
//  End -->