//preloading images for rollovers
		
		home_on = new Image();
		home_on.src = "../images/n_home_1.gif";
		home_off = new Image();
		home_off.src = "../images/n_home_0.gif";
		
		summary_on = new Image();
		summary_on.src = "../images/n_summary_1.gif";
		summary_off = new Image();
		summary_off.src = "../images/n_summary_0.gif";

		speakers_on = new Image();
		speakers_on.src = "../images/n_speakers_1.gif";
		speakers_off = new Image();
		speakers_off.src = "../images/n_speakers_0.gif";

		resources_on = new Image();
		resources_on.src = "../images/n_resources_1.gif";
		resources_off = new Image();
		resources_off.src = "../images/n_resources_0.gif";

		transcript_on = new Image();
		transcript_on.src = "../images/n_transcript_1.gif";
		transcript_off = new Image();
		transcript_off.src = "../images/n_transcript_0.gif";

	function rollOn(iName) {
		if (document.images) {
		document[iName].src = eval(iName + "_on.src");
		}
	}

	function rollOff(iName) {
		if (document.images) {
		document[iName].src = eval(iName + "_off.src");
		}
	}



	function openPopup(URL) {
		popupWin = window.open(URL,"image_window","status=no,resizable=yes,scrollbars=yes,width=680,height=505");
		if (popupWin.opener == null) popupWin.opener = window; 
		popupWin.opener.name = "neuro_main";
		popupWin.focus ();
	}

	function openPopup2(URL) {
		popupWin = window.open(URL,"image_window","status=no,resizable=yes,scrollbars=yes,width=690,height=520");
		if (popupWin.opener == null) popupWin.opener = window; 
		popupWin.opener.name = "neuro_main";
		popupWin.focus ();
	}
	
// print page

	function printPage() {
		if (window.print) {
			window.print();
		} else {
			if (navigator.platform.indexOf('Mac') != -1) {
				alert('This function does not work on your browser! \n Please select the Print option from the File menu.');
			} else if (navigator.platform.indexOf('Win') != -1) {
				alert('This function does not work on your browser! \n Please right click on your mouse and select the Print option.');
			} else { 
				alert('This function does not work on your browser!');
			}
 }
}