function roll(imName,srcName,dir) {
	document.images[imName].src = imgArray[srcName+"_"+dir].src;
}

function hidesubnav() {
	hideObj('subnav');
}

function showsubnav() {
	showObj('subnav');
}

function openWin(vUrl) {
	width  = 650;
	height = 600;
	fTop = (screen.availHeight-height)/2-20;
	fLeft = (screen.availWidth-width)/2;
	F0 = window.open(vUrl,"online_exhibitions","top="+fTop+",left="+fLeft+",width="+width+",innerWidth="+width+",height="+height+",innerHeight="+height);
}

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}