function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		idx_tab_bnra_over = newImage('images/idx_tab_bnra-over.gif');
		idx_tab_bnra_idx_tab_enews_over = newImage('images/idx_tab_bnra-idx_tab_enews_.gif');
		idx_tab_enews_idx_tab_bnra_over = newImage('images/idx_tab_enews-idx_tab_bnra_.gif');
		idx_tab_enews_over = newImage('images/idx_tab_enews-over.gif');
		idx_tab_enews_idx_tab_sub_over = newImage('images/idx_tab_enews-idx_tab_sub_o.gif');
		idx_tab_sub_idx_tab_enews_over = newImage('images/idx_tab_sub-idx_tab_enews_o.gif');
		idx_tab_sub_over = newImage('images/idx_tab_sub-over.gif');
		idx_tab_sub_idx_tab_bg_over = newImage('images/idx_tab_sub-idx_tab_bg_over.gif');
		idx_tab_bg_idx_tab_sub_over = newImage('images/idx_tab_bg-idx_tab_sub_over.gif');
		idx_tab_bg_over = newImage('images/idx_tab_bg-over.gif');
		idx_bt_ref_over = newImage('images/idx_bt_ref-over.gif');
		idx_bt_back_over = newImage('images/idx_bt_back-over.gif');
		idx_bt_mess_over = newImage('images/idx_bt_mess-over.gif');
		idx_bt_edcal_over = newImage('images/idx_bt_edcal-over.gif');
		idx_bt_adspecs_over = newImage('images/idx_bt_adspecs-over.gif');
		idx_bt_class_over = newImage('images/idx_bt_class-over.gif');
		idx_bt_links_over = newImage('images/idx_bt_links-over.gif');
		idx_bt_staff_over = newImage('images/idx_bt_staff-over.gif');
		preloadFlag = true;
	}
}

function OpenBrWindow(theURL,winName,features, myWidth, myHeight, isCenter) { //v3.0
	  if(window.screen)if(isCenter)if(isCenter=="true"){
	    var myLeft = (screen.width-myWidth)/2;
	    var myTop = (screen.height-myHeight)/2;
	    features+=(features!='')?',':'';
	    features+=',left='+myLeft+',top='+myTop;
		window.focus();
	}
	window.open(theURL,winName,features+((features!='')?',':'')+'width='+myWidth+',height='+myHeight);
}