if (document.images) 
		{
		var hom_on = new Image(); hom_on.src =  'images/btn_hom_on.gif';
		var hom_off = new Image();hom_off.src = 'images/btn_hom.gif';
		var con_on = new Image(); con_on.src =  'images/btn_con_on.gif';
		var con_off = new Image();con_off.src = 'images/btn_con.gif';
		var ord_on = new Image(); ord_on.src =  'images/btn_ord2_on.gif';
		var ord_off = new Image();ord_off.src = 'images/btn_ord2.gif';
		var pak_on = new Image(); pak_on.src =  'images/btn_pak_on.gif';
		var pak_off = new Image();pak_off.src = 'images/btn_pak.gif';
		var phi_on = new Image(); phi_on.src =  'images/btn_phi_on.gif';
		var phi_off = new Image();phi_off.src = 'images/btn_phi.gif';
		var son_on = new Image(); son_on.src =  'images/btn_son_on.gif';
		var son_off = new Image();son_off.src = 'images/btn_son.gif';
		var sun_on = new Image(); sun_on.src =  'images/btn_sun_on.gif';
		var sun_off = new Image();sun_off.src = 'images/btn_sun.gif';
		var tes_on = new Image(); tes_on.src =  'images/btn_tes_on.gif';
		var tes_off = new Image();tes_off.src = 'images/btn_tes.gif';
		var wat_on = new Image(); wat_on.src =  'images/btn_wat_on.gif';
		var wat_off = new Image();wat_off.src = 'images/btn_wat.gif';
		var stu_on = new Image(); stu_on.src =  'images/btn_stu_on.gif';
		var stu_off = new Image();stu_off.src = 'images/btn_stu.gif';
		}

	function imgOn(imgName) 
		{if (document.images){document[imgName].src = eval(imgName + "_on.src");}}
				
	function imgOff(imgName) 
		{if (document.images){document[imgName].src = eval(imgName + "_off.src");}}
	
	function winGo(box)
		{
		if ((-1 < box.selectedIndex) && (box.options[box.selectedIndex].value != 'nil'))
			{
			val = box.options[box.selectedIndex].value;
			OpenWin = this.open(val, "SmallWindow", "toolbar=no,menubar=no,location=no,scrollbars=yes,resizable=no,height=300,width=300");
			}
		}