var imageFiles_a_13 = new Array();
imageFiles_a_13['0'] = new Array ('_images/a_Home.gif', '_images/a_HomeMouseover.gif');
imageFiles_a_13['1'] = new Array ('_images/a_About_Us.gif', '_images/a_About_UsMouseover.gif');
imageFiles_a_13['2'] = new Array ('_images/a_Services.gif', '_images/a_ServicesMouseover.gif');
imageFiles_a_13['3'] = new Array ('_images/a_Insulation.gif', '_images/a_InsulationMouseover.gif');
imageFiles_a_13['4'] = new Array ('_images/a_Duct_Cleaning.gif', '_images/a_Duct_CleaningMouseover.gif');
imageFiles_a_13['5'] = new Array ('_images/a_Leaky_Ducts.gif', '_images/a_Leaky_DuctsMouseover.gif');
imageFiles_a_13['6'] = new Array ('_images/a_Dryer_Ducts.gif', '_images/a_Dryer_DuctsMouseover.gif');
imageFiles_a_13['7'] = new Array ('_images/a_FAQs.gif', '_images/a_FAQsMouseover.gif');
imageFiles_a_13['8'] = new Array ('_images/a_Contact_Us.gif', '_images/a_Contact_UsMouseover.gif');
imageFiles_a_13['9'] = new Array ('_images/a_Request_Form.gif', '_images/a_Request_FormMouseover.gif');
imageFiles_a_13['10'] = new Array ('_images/a_Links.gif', '_images/a_LinksMouseover.gif');
imageFiles_a_13['11'] = new Array ('_images/a_Site_Map.gif', '_images/a_Site_MapMouseover.gif');
imageFiles_a_13['12'] = new Array ('_images/a_Windows.gif', '_images/a_WindowsMouseover.gif');

function image_on_a_13 (position) {
   var doc = eval("document.imagea_13" + position);
   doc.src = imageFiles_a_13[position][1];
}

function image_off_a_13 (position) {
   var doc = eval("document.imagea_13" + position);
   doc.src = imageFiles_a_13[position][0];
}