Aufzählungszeichen ändern!

<script type="text/javascript">
var source = 'URL';

function myOwnBulletPoints()
{
var i;
var allLinks = document.getElementsByTagName('a');
var newBulletPoint = document.createElement('img');
newBulletPoint.src = source;
newBulletPoint.className = 'new_bullet_points';
newBulletPoint.alt = 'icon';

for(i = 0; i < allLinks.length; i++)
{
if((allLinks[i].className == 'menu') && (allLinks[i].firstChild.nodeName == '#text') && (allLinks[i].firstChild.nodeValue.substr(0, 2) == '=>'))
{
allLinks[i].firstChild.nodeValue = allLinks[i].firstChild.nodeValue.substr(2, allLinks[i].firstChild.nodeValue.length - 2)
allLinks[i].insertBefore(newBulletPoint, allLinks[i].firstChild);
}
}
}
</script>

<style type="text/css">
.new_bullet_points
{
width:50px;
height:15px;
}
</style>

<style type="text/css">
.new_bullet_points
{
visibility:hidden;
width:Xpx;
}
</style>