var xPos = 20; 
var yPos = document.documentElement.clientHeight; 
var step = 1; 
var delay = 30; 
var height = 0;
var width = 0; 
var Hoffset = 0; 
var Woffset = 0; 
var yon = 0; 
var xon = 0; 
var pause = true; 
var interval; 


function changePos() { 
var flap = document.getElementById("FlapLayer");
width = document.documentElement.clientWidth; 
height = document.documentElement.clientHeight; 
Hoffset = flap.offsetHeight; 
Woffset = flap.offsetWidth; 
flap.style.left = xPos + document.documentElement.scrollLeft; 
flap.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 www_helpor_net(linkUrl,picUrl,isClosable) { 
    var str = "<div id=FlapLayer style='text-align: right;background-color: #eeeeee;position:absolute;'>";
    if (linkUrl != "")
    {
        str = str + "<a href='" + linkUrl + "' target=_blank>";
    }
    str = str + "<img src='" + picUrl + "' border=0>";
    if (linkUrl != "")
    {
        str = str + "</a>";
    }
    if (isClosable)
    {
        str = str + "<BR><a href='javascript:closeAd(document.all.FlapLayer);' style='font-size:10pt;'>关&nbsp;闭</a>&nbsp;";
    }
    
 
    str = str + "</div>";
    
    
    document.write(str); 
   
   eval("document.all.FlapLayer.style.top = yPos");
   

    interval = setInterval('changePos()', delay); 
    FlapLayer.onmouseover=function(){clearInterval(interval)}  
    FlapLayer.onmouseout=function(){interval=setInterval("changePos()", delay)}

}