var imageFiles_4g_13 = new Array();
imageFiles_4g_13['0'] = new Array ('_images/4g_Home.gif', '_images/4g_HomeMouseover.gif');
imageFiles_4g_13['1'] = new Array ('_images/4g_About_Us.gif', '_images/4g_About_UsMouseover.gif');
imageFiles_4g_13['2'] = new Array ('_images/4g_Heating.gif', '_images/4g_HeatingMouseover.gif');
imageFiles_4g_13['3'] = new Array ('_images/4g_Cooling.gif', '_images/4g_CoolingMouseover.gif');
imageFiles_4g_13['4'] = new Array ('_images/4g_Duct_Cleaning.gif', '_images/4g_Duct_CleaningMouseover.gif');
imageFiles_4g_13['5'] = new Array ('_images/4g_Air_Quality.gif', '_images/4g_Air_QualityMouseover.gif');
imageFiles_4g_13['6'] = new Array ('_images/4g_Zoning.gif', '_images/4g_ZoningMouseover.gif');
imageFiles_4g_13['7'] = new Array ('_images/4g_Fireplaces.gif', '_images/4g_FireplacesMouseover.gif');
imageFiles_4g_13['8'] = new Array ('_images/4g_Contact_Us.gif', '_images/4g_Contact_UsMouseover.gif');

function image_on_4g_13 (position) {
   var doc = eval("document.image4g_13" + position);
   doc.src = imageFiles_4g_13[position][1];
}

function image_off_4g_13 (position) {
   var doc = eval("document.image4g_13" + position);
   doc.src = imageFiles_4g_13[position][0];
}