function setLogoSize() {

  screenSize = document.body.clientWidth;

	if (screenSize < 1000) {
		document.getElementById('logo1').style.visibility='hidden';
		document.getElementById('logo2').style.visibility='visible';
	} else {
		document.getElementById('logo2').style.visibility='hidden';
		document.getElementById('logo1').style.visibility='visible';
	}

  panelWidth = screenSize - 220;
  document.getElementById('leftpanel').style.width = panelWidth + 'px';
  document.getElementById('leftpanel').style.visibility = 'visible';

}

function alertSize() {
	var myWidth = 0, myHeight = 0;
	if(typeof (window.innerWidth ) == 'number') {
	//Non-IE
	myWidth = window.innerWidth;
	myHeight = window.innerHeight;
	} else if (document.getElementById('leftpanel') && (
		document.getElementById('leftpanel').clientWidth ||
		document.getElementById('leftpanel').clientHeight) ) {
	//If IE6+ in 'standards compliant mode'
	myWidth = document.getElementById('leftpanel').clientWidth;
	myHeight = document.getElementById('leftpanel').clientHeight;
	} else if ( document.body && (document.body.clientWidth ||
		document.body.clientHeight) ) {
		//IE4 compatible
		myWidth = document.body.clientWidth;
		myHeight = document.body.clientHeight;
	}
	window.alert ( 'Width = ' + myWidth );
	window.alert ( 'Height = ' +myHeight );
}

function closeAllButtons(){
	document.getElementById('desc_back').style.visibility='hidden';
	document.getElementById('contact_desc').style.visibility='hidden';
	document.getElementById('studentweb_desc').style.visibility='hidden';
	document.getElementById('guide_desc').style.visibility='hidden';
	document.getElementById('contact_button2').style.visibility='hidden';
	document.getElementById('contact_button').style.visibility='visible';
	document.getElementById('studentweb_button2').style.visibility='hidden';
	document.getElementById('studentweb_button').style.visibility='hidden';
	document.getElementById('guide_button2').style.visibility='hidden';
	document.getElementById('guide_button').style.visibility='visible';
}

function imgOn(buttonID,buttonID2,descID) {

	closeAllButtons();
	document.getElementById(buttonID).style.visibility='hidden';
	document.getElementById(buttonID2).style.visibility='visible';
	document.getElementById('desc_back').style.visibility='visible';
	document.getElementById(descID).style.visibility='visible';

}

function imgOff(buttonID,buttonID2,descID) {

	document.getElementById(buttonID2).style.visibility='hidden';
	document.getElementById(buttonID).style.visibility='visible';
	document.getElementById('desc_back').style.visibility='hidden';
	document.getElementById(descID).style.visibility='hidden';

}

function popUpWindow(path) {
popUpWindowSP = window.open(path, "openWin", "width=600,height=600,resizable,scrollbars,screenx=100,screeny=10,left=100,top=10");
window.popUpWindowSP.focus();
}
function popUpVirtual(path) {
popUpWindowSP = window.open(path, "openWin", "width=708,height=376,resizable,scrollbars,screenx=100,screeny=10,left=100,top=10");
window.popUpWindowSP.focus();
}
function popUpTour(path) {
popUpWindowSP = window.open(path, "openWin", "width=600,height=600,resizable,scrollbars,screenx=100,screeny=10,left=100,top=10");
window.popUpWindowSP.focus();
}