Lets start over.
Put 3cyan.gif in as the star file name.
Go to a post you have written
RIght mouse click on the star image.
Get the url.
Put it in place of OLD URL in the following code
Put the url of the image you want to use in place of NEW URL (make sure that image url works)
<script type='text/javascript'>
/*
Change Any Image On Page
Created by iFusion
*/
var img_b = new Array();
img_b[img_b.length++] = [ "OLD URL" , "NEW URL" ]
var all_images = document.getElementsByTagName('IMG');
for(i=0;i<all_images.length;i++){
for(j=0;j<img_b.length;j++){
if(all_images[i].src == img_b[j][0]){
all_images[i].src = img_b[j][1];
}}}
</script>