function pop_win(pop,popW,popH) {
	var w = 480, h = 340;
	if (document.all || document.layers) {
		w = screen.availWidth;
		h = screen.availHeight;
		var leftPos = (w-popW)/2, topPos = (h-popH)/2;
		myWin=open(pop,'popup','width='+popW+',height='+popH+',top='+topPos+',left='+leftPos+',toolbar=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no');
	} else {
		myWin=open(pop, 'popup', 'width='+popW+',height='+popH+',toolbar=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no');
	}
}
function pic_win(imageSrc) {
	myWin=open('pic.php?picName='+imageSrc+'', 'imagePopup','width=360,height=360,toolbar=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no');
}
if (document.images) {
	img1on = new Image();
	img1on.src = "images/navi_1_over.gif";

	img1off = new Image();
	img1off.src = "images/navi_1_off.gif";

	img2on = new Image();
	img2on.src = "images/navi_2_over.gif";

	img2off = new Image();
	img2off.src = "images/navi_2_off.gif";

	img3on = new Image();
	img3on.src = "images/navi_3_over.gif";

	img3off = new Image();
	img3off.src = "images/navi_3_off.gif";

	img4on = new Image();
	img4on.src = "images/navi_4_over.gif";

	img4off = new Image();
	img4off.src = "images/navi_4_off.gif";

	img5on = new Image();
	img5on.src = "images/navi_5_over.gif";

	img5off = new Image();
	img5off.src = "images/navi_5_off.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");
        }
}