javascript newbie "is not a function?"

[Vayle]

Hi,

I'm trying to set up a rollover on an image map so that the image changes on mouse over.

I keep getting "libcat is not a function" in the firefox javascript debugger.

Honestly I don't use javascript that often so I may have made pretty simple mistake.

here's this part of the javascript...

<script type="text/javascript">
function libcat(img_ovr) {
document.getElementById(img_ovr).src = "libcat.gif";
}
</script>

here's the html...

[HTML]<div id="wrapper">
<img alt="leftcolumn" src="colleft.gif" height="444px" width="117px" id="leftone" />
<img alt="centerleft" src="left.gif" height="444px" width="262px" id="lefttwo" usemap="#leftmap" />

<map id ="leftmap" name="leftmap">
<area shape ="poly" coords ="141,76,174,124,218,166,232,165,253,156,254,107,252,54,192,56"
onMouseOver="libcat('lefttwo')"
href ="_insert_here_" alt="library catalogue" />

</map>
</div>

Any ideas what I'm doing wrong?

Thanks

[darkwater23]

I replicated your code the best I could and didn't get the same error. Is your function in an external JS file? If so, there may be a problem with the include. Otherwise, nothing pops out at me. Sorry!