Sådan noget her ?
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "
http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="content-type" content="text/html; charset=iso-8859-1"><title>Ingen titel</title>
<script type="text/javascript">
function GoerNoget(t){
document.getElementById("imageurl").setAttribute("value",t);
}
</script>
</head><body>
<a href="#dunno" onclick="GoerNoget(this.firstChild.nodeValue);">test.jpg</a><br>
<a href="#dunno" onclick="GoerNoget(this.firstChild.nodeValue);">test2.jpg</a><br>
<a href="#dunno" onclick="GoerNoget(this.firstChild.nodeValue);">test3.jpg</a><br><br>
<b onclick="GoerNoget(this.firstChild.nodeValue);">test.jpg</b><br>
<b onclick="GoerNoget(this.firstChild.nodeValue);">test2.jpg</b><br>
<b onclick="GoerNoget(this.firstChild.nodeValue);">test3.jpg</b><br><br>
Så tilføjer den det i input tag som ser således ud:
<input type="text" name="imageurl" id="imageurl" class="" />
</body></html>