function getStyleObject(objectId) {
    // cross-browser function to get an object's style object given its id
    if(document.getElementById && document.getElementById(objectId)) {
	// W3C DOM
	return document.getElementById(objectId).style;
    } else if (document.all && document.all(objectId)) {
	// MSIE 4 DOM
	return document.all(objectId).style;
    } else if (document.layers && document.layers[objectId]) {
	// NN 4 DOM.. note: this won't find nested layers
	return document.layers[objectId];
    } else {
	return false;
    }
} // getStyleObject

function changeObjectVisibility(objectId, newVisibility) {
    // get a reference to the cross-browser style object and make sure the object exists
    var styleObject = getStyleObject(objectId);
    if(styleObject) {
	styleObject.visibility = newVisibility;
	return true;
    } else {
	// we couldn't find the object, so we can't change its visibility
	return false;
    }
} // changeObjectVisibility

function moveObject(objectId, newXCoordinate, newYCoordinate) {
    // get a reference to the cross-browser style object and make sure the object exists
    var styleObject = getStyleObject(objectId);
    if(styleObject) {
	styleObject.left = newXCoordinate;
	styleObject.top = newYCoordinate;
	return true;
    } else {
	// we couldn't find the object, so we can't very well move it
	return false;
    }
} // moveObject



var Alta = "http://www.altavista.digital.com/cgi-bin/query?pg=q&what=web&kl=XX&q=host:ic.polyu.edu.hk+";
var url ="";
var txt="";

function GoSearch(item) {
txt = escape(item.text.value);
url = Alta + txt + "&mode=and";
resultsWin = open("","results");
resultsWin.location = url;
}
function placeFocus() {
document.FormSearch.text.focus();
}

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 search() {
	var temp = document.form1.SearchTxt.value;

      //window.open("http://www.google.com/search?hl=en&lr=lang_zh-CN|lang_zh-TW|lang_en|lang_fr&btnG=Google+Search&as_sitesearch=ic.polyu.edu.hk&safe=images&as_q=" + txt);
      var txt = encode(temp);
      window.open("http://www.google.com/search?hl=en&ie=UTF8&oe=UTF8&btnG=Google+Search&as_sitesearch=ic.polyu.edu.hk&safe=images&as_q=" + txt);
    
}

var imgheight
var imgleft
window.screen.width>800 ? imgheight=120:imgheight=120
window.screen.width>800 ? imgleft=10:imgleft=10
function myLeftLoad()
{
cl_style.style.top=document.body.scrollTop+document.body.offsetHeight-imgheight-20;
cl_style.style.left=imgleft;
//cl_stylebig.style.top=document.body.scrollTop + top_F +1;
//cl_stylebig.style.left = left_F>=0?left_F:(document.body.offsetWidth - sWidth_F)/2;
setTimeout("myLeftLoad();",50);
}

document.ns = navigator.appName == "Microsoft Internet Explorer"

function openWin(){
	
	if(document.ns){	

		myLeftLoad();
		
		var playCnt;  
        var set_counter=amt(playCnt,"cntOf" + document.URL);
		if(set_counter==1) 
		{
            if(v_flag == "f") 
            {
			   cl_style.style.visibility='hidden';
			   cl_stylebig.style.visibility='visible';
            }
            else 
            {
               cl_style.style.visibility='visible';
			   cl_stylebig.style.visibility='hidden';
            }
		}
        else 
		{
            cl_style.style.visibility='visible';
			cl_stylebig.style.visibility='hidden';

            //if(ban_flag==0) 
            //{
			//   cl_style.style.visibility='visible';
			//   cl_stylebig.style.visibility='hidden';
            //}
            //else
            //{
			//   cl_style.style.visibility='hidden';
			//   cl_stylebig.style.visibility='visible';
            //}

		}
        //alert(set_counter);
	
	}

}


var v_flag;
var sIe=false;
var sSwf=(navigator.mimeTypes && navigator.mimeTypes["application/x-shockwave-flash"]) ? navigator.mimeTypes["application/x-shockwave-flash"].enabledPlugin : 0;
if (sSwf) sSwf=parseInt(sSwf.description.substring(sSwf.description.indexOf(".")-1)) >= 6;
else if (navigator.userAgent && navigator.userAgent.indexOf("MSIE")>=0 && navigator.userAgent.indexOf("Windows")>=0)
{
	var sIe=true;
	document.write('<SCRIPT LANGUAGE=VBScript\> \n');
	document.write('on error resume next \n');
	document.write('sSwf=(IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.6")))\n');
	document.write('</SCRIPT\> \n');
}

	if (sSwf&&sIe)
		v_flag="f";
	else if (sSwf)
		v_flag="f";
	else
		v_flag="i";