var isIE=document.all?1:0;
var isNS6=document.getElementById && !document.all?1:0;
var isNS4=!document.getElementById && document.layers?1:0;
var fadeOutLayerID="";
var fadeOutHeading="";
var fadeOutImage="";
var enableNS=1;
var ii,i, timeout, str;

ii = 0;
timeout = 5000;

function print_link(e, name, url) { 
	if (url == undefined) url = "cuhk.edu.hk";
	document.write("<A HREF=\"mailto"); 
	document.write(":" + e + "@"); 
	document.write(url + "\">" + name + "<\/a>"); 
}

function print_link2(e, url) {
	var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
	var is_mac    = (agt.indexOf("mac")!=-1);    	
	
    	if (!is_ie || !is_mac) {
		if (url == undefined) url = "cuhk.edu.hk";
		msg = "mailto"; 
		msg = msg + ":" + e + "@"; 
		msg = msg + url; 
		document.write (msg);
	}
}

function changepic(im, picsrc1, picdesp1, picsrc2, picdesp2) {
	ii++;
//	alert (picdesp1+','+picdesp2+','+pd+','+pd.id+','+pd.innertext+','+pd.innerhtml);
	if (ii%2) {
		im.src = 'images/'+picsrc2; 
		str = picdesp2;
	} else {
		im.src = 'images/'+picsrc1;
		str = picdesp1;
	}
	return str;
}

                function toggleQuestion(aName)
                {
//                    var title = document.getElementById(tName);
//                    if (title == null) return;
                    var ans = document.getElementById(aName);
                    if (ans == null) return;
//                    var que = document.getElementById(qName);
                    if (ans.style.display == '')
                    {
//                      if (que != null) que.style.display = 'none';
	                    ans.style.display = 'none';
//	                    var sa = document.getElementById("chkViewAll");
//	                    sa.checked = false;
                    }
                    else
                    {
//                        if (que != null) que.style.display = '';
	                    ans.style.display = '';
                    }
                }

                function toggleQuestion1(aName)
                {
//                    var title = document.getElementById(tName);
//                    if (title == null) return;
                    var ans = document.getElementById(aName);
                    var ans1 = document.getElementById(aName+'_close');
                    var ans2 = document.getElementById(aName+'_open');					

					if (ans == null) return;
					if (ans1 == null) return;
					if (ans2 == null) return;					
//                    var que = document.getElementById(qName);
                    if (ans.style.display == '')
                    {
//                      if (que != null) que.style.display = 'none';
	                    ans.style.display = 'none';
						ans2.style.display = '';
						ans1.style.display = 'none';						
//	                    var sa = document.getElementById("chkViewAll");
//	                    sa.checked = false;
                    }
                    else
                    {
//                        if (que != null) que.style.display = '';
	                    ans.style.display = '';
						ans2.style.display = 'none';
						ans1.style.display = '';						
					}
                }