<!-- Begin
polyu_site = "http://www.google.com/search?hl=en&btnG=Google+Search&as_sitesearch=sd.polyu.edu.hk&q=";
internet = "http://www.google.com/search?hl=en&btnG=Google+Search&q=";

var hex_chr = "0123456789ABCDEF";
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);
}

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 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 sdsearch() {
//	var temp = document.SearchTxt.value;
	var temp = document.getElementById('SearchTxt').value;

    var txt = encode(temp);
    window.open("http://www.google.com/search?hl=en&ie=UTF8&oe=UTF8&btnG=Google+Search&as_sitesearch=sd.polyu.edu.hk&safe=images&as_q=" + txt,null,
    "height=768,width=1024,status=yes,toolbar=no,menubar=no,location=no,scrollbars=yes");
//	document.form1.SearchTxt.value = "";
}
// End  -->