if (document.images) {
			officeon = new Image;
	        officeon.src = "../common/images/office_properties_ro.gif";
	        officeoff = new Image;
	        officeoff.src = "../common/images/office_properties.gif";
			
			retailon = new Image;
	        retailon.src = "../common/images/retail_properties_ro.gif";
	        retailoff = new Image;
	        retailoff.src = "../common/images/retail_properties.gif";
			
			warehouseon = new Image;
	        warehouseon.src = "../common/images/warehouse_properties_ro.gif";
	        warehouseoff = new Image;
	        warehouseoff.src = "../common/images/warehouse_properties.gif";
			
			availableon = new Image;
	        availableon.src = "../common/images/available_space_ro.gif";
	        availableoff = new Image;
	        availableoff.src = "../common/images/available_space.gif";
	
			propertyon = new Image;
	        propertyon.src = "../common/images/property_catalogue_ro.gif";
	        propertyoff = new Image;
	        propertyoff.src = "../common/images/property_catalogue.gif";
			
			callnowon = new Image;
	        callnowon.src = "../common/images/callnow_ro.gif";
	        callnowoff = new Image;
	        callnowoff.src = "../common/images/callnow.gif";
	
	 function img_on(imgName) {
             if (document.images) {
             imgOn = eval(imgName + "on.src");
             document [imgName].src = imgOn;
             }
     }
     function img_off(imgName) {
             if (document.images) {
             imgOff = eval(imgName + "off.src");
             document [imgName].src = imgOff;
             }
     }
}