How do i refer to my <div> in this Javascript?

Hello,

At present my site includes the following code which launches the function 'showFrontLayer' if the icon type is neither pushpin or marker:

if ((poi_markers.getAttribute("icon")!='pushpin') && (poi_markers.getAttribute("icon")!='arrow')) {
                    GEvent.addListener(marker,'click',function(){ showFrontLayer(); });
                }

I want to modify this now so that if the marker is a puspin or arrow it loads any content in a div (id="poi_overview"). I'm half way there except that i don't know how to refer to the div in question - see code snippet below:


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if ((poi_markers.getAttribute("icon")='pushpin') || (poi_markers.getAttribute("icon")='arrow')) {
                    WHAT GOES HERE TO REFER TO THE DIV poi_overview
                }
else {
GEvent.addListener(marker,'click',function(){ showFrontLayer(); });
}