function  findLink(URL) {
  if (URL == 1) siteLink="";
  if (URL == 2) siteLink="../";
  if (URL == 3) siteLink="../../";
  if (URL == 4) siteLink="../../../";
  if (URL == 5) siteLink="../../../../";

}

function showFooter(URL) {
  findLink(URL);
  Footer = '<table width="900" border="0" align="center" cellpadding="0" cellspacing="0"><tr><td bgcolor="#BFDA6D" align="center"><img src="' + siteLink + 'img/bottom_copyright.jpg" width="280" height="29"></td></tr></table>'
	   document.write(Footer);
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

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

function MM_openNews(theURL) { //v2.0
  var winName = "news";
  var features="scrollbars=yes,resizable=yes,width=665,height=570";
  aPopupWindow = window.open(theURL,winName,features);
  aPopupWindow.focus(); 
}

function MM_openNewsURL(theURL) { //v2.0
  var winName = "news";
  var features="scrollbars=yes,resizable=yes,width=850,height=660";
  aPopupWindow = window.open(theURL,winName,features);
  aPopupWindow.focus(); 
}


function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);

function MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}

function MM_jumpMenu(targ,selObj,restore){ //v3.0
  eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
  if (restore) selObj.selectedIndex=0;
}

function tour()
{
window.open("http://publish.ust.hk/univ/campusvr/quicktime/a03_piazza.html", "tour", "width=965,height=650,toolbar=no,top=0,left='+winl+',resizable=yes")
}

function schoollist(schoollink)
{
window.open(schoollink, "list", "width=698,height=650,toolbar=no,resizable=yes, top=0,left='+winl+',scrollbars=yes")
}

function gallery(url) {
  popupWindow = window.open('','Url_Popup','toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=yes,width=735,height=650, top=100, left=100');
  popupWindow.location.href = url;
  popupWindow.focus();
}