var imageFiles_87_13 = new Array();
imageFiles_87_13['0'] = new Array ('_images/87_RESIDENTIAL.gif', '_images/87_RESIDENTIALMouseover.gif');
imageFiles_87_13['1'] = new Array ('_images/87__COMMERCIAL_.gif', '_images/87__COMMERCIAL_Mouseover.gif');
imageFiles_87_13['2'] = new Array ('_images/87_ORDER_FUEL.gif', '_images/87_ORDER_FUELMouseover.gif');

function image_on_87_13 (position) {
   var doc = eval("document.image87_13" + position);
   doc.src = imageFiles_87_13[position][1];
}

function image_off_87_13 (position) {
   var doc = eval("document.image87_13" + position);
   doc.src = imageFiles_87_13[position][0];
}