漂浮广告，当鼠标放到上面的时候，希望停止漂浮<div id="img" style="position:absolute;; width: 200; height: 151">广告内容</div> <script LANGUAGE="JavaScript"> var xPos = 20; var yPos = 10; img.style.left= xPos; img.style.top = yPos; var step = 1; var delay = 30; var width,height,Hoffset,Woffset; var y = 1; var x = 1; var interval; img.visibility = "visible"; function changePos() { width = document.body.clientWidth; height = document.body.clientHeight; Hoffset = img.offsetHeight; Woffset = img.offsetWidth; 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); } if (x) { xPos = xPos + step; } else { xPos = xPos - step; } if (xPos < 0) { x = 1; xPos = 0; } if (xPos >= (width - Woffset)) { x = 0; xPos = (width - Woffset); } img.style.left = xPos + docu