document.write('<div id="imgall" style="position:absolute; width:201; height:100"><a href="http://www.rgjs.gov.cn/vote/file/201172010859.asp"  target="_blank"><img src="/v.jpg"  border="0"></a></div>');

var xPos = 20; 
var yPos = 10; 
document.getElementById("imgall").style.left= xPos; 
document.getElementById("imgall").style.top = yPos; 
var step = 1; 
var delay = 30; 
var width,height,Hoffset,Woffset; 
var y = 1; 
var x = 1; 
var interval; 
document.getElementById("imgall").visibility = "visible"; 

function changePos() 
{ 
    width = document.body.clientWidth; 
    height = document.body.clientHeight; 
    Hoffset = document.getElementById("imgall").offsetHeight; 
    Woffset = document.getElementById("imgall").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); 
    } 
    document.getElementById("imgall").style.left = xPos + document.body.scrollLeft; 
    document.getElementById("imgall").style.top = yPos + document.body.scrollTop; 
} 
function start() 
{ 
    interval = setInterval("changePos()", delay); 
} 
function pause_resume() 
{ 
    clearInterval(interval); 
} 
start();