<!--
var hex_chr = "0123456789ABCDEF";

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 search() {
	var temp = document.getElementById('searchtext').value;
    var txt = encode(temp);
    window.open("http://www.google.com/search?hl=en&ie=UTF8&oe=UTF8&btnG=Google+Search&as_sitesearch=polyu.edu.hk/hall&safe=images&as_q=" + txt,null,
    "height=768,width=1024,status=yes,toolbar=no,menubar=no,location=no,scrollbars=yes");
}

function encode(val){
	var len     = val.length;
	var i       = 0;
	var newStr  = "";
	for (i=0;i<len;i++) {
		tval1=val.substring(i,i+1);
		newStr = newStr + toUTF8(tval1.charCodeAt(0));
	}
    return newStr;
}

function toUTF8(tchar) {
	var k = 0;
	var str = "";
	var mask = 0;
	var pattern = 0;

	if (tchar < 0x80) {
		k = 0;
	} else if ((tchar > 0x7F) && (tchar < 0x800)) {
		k = 1;
	} else if ((tchar > 0x7FF) && (tchar < 0x10000)) {
		k = 2;
	} else if ((tchar > 0xFFFF) && (tchar < 0x200000)) {
		k = 3;
	} else if ((tchar > 0x1FFFFF) && (tchar < 0x4000000)) {
		k = 4;
	} else if ((tchar > 0x3FFFFFF) && (tchar <= 0x7FFFFFFF)) {
		k = 5;
	}

	for (i = 0; i < k; i++) {
		num = ((tchar >> (6 * i)) & 0xBF) | 0x80;
		str = hex(num) + str;
	}

	if (k == 1) {
		mask = 0xDF;
		pattern = 0xC0;
	} else if (k == 2) {
		mask = 0xEF;
		pattern = 0xE0;
	} else if (k == 3) {
		mask = 0xF7;
		pattern = 0xF0;
	} else if (k == 4) {
		mask = 0xFB;
		pattern = 0xF8;
	} else if (k == 5) {
		mask = 0xFD;
		pattern = 0xFC;
	}

	if (k > 0) {
		num = ((tchar >> (6 * k)) & mask) | pattern;
		str = hex(num) + str;
	} else {
		str = hex(tchar);
	}

	return str;
}

function hex(num)
{
	var str = "";
  	for(var j = 4; j >= 0; j--) {
		str += hex_chr.charAt((num >>> (j * 4)) & 0x0F);
	}

	len = str.length;
  	return "%" + str.substring((len - 2),len);
}
//-->