var imageFiles_53_55 = new Array();
imageFiles_53_55['0'] = new Array ('_images/53_All_Heating_Parts.gif', '_images/53_All_Heating_PartsMouseover.gif');

function image_on_53_55 (position) {
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   doc.src = imageFiles_53_55[position][1];
}

function image_off_53_55 (position) {
   var doc = eval("document.image53_55" + position);
   doc.src = imageFiles_53_55[position][0];
}