var imageFiles_bx_4 = new Array();
imageFiles_bx_4['0'] = new Array ('_images/bx_Fan_Lights.gif', '_images/bx_Fan_LightsMouseover.gif');

function image_on_bx_4 (position) {
   var doc = eval("document.imagebx_4" + position);
   doc.src = imageFiles_bx_4[position][1];
}

function image_off_bx_4 (position) {
   var doc = eval("document.imagebx_4" + position);
   doc.src = imageFiles_bx_4[position][0];
}