/* ================================================================ */
/*  ------------------------------------- AJAX Function -------------------------------------  */
/* ================================================================ */
function openAjax() {
	var ajax; 
	try { 
		ajax = new XMLHttpRequest(); 
	} catch (ee) { 
		try { 
			ajax = new ActiveXObject("Msxml2.XMLHTTP"); 
		} catch (e) { 
			try { 
				ajax = new ActiveXObject("Microsoft.XMLHTTP"); 
			} catch (E) { 
				ajax = false; 
			} 
		} 
	} 
	return ajax; 
}

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_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_nbGroup(event, grpName) { //v6.0
  var i,img,nbArr,args=MM_nbGroup.arguments;
  if (event == "init" && args.length > 2) {
    if ((img = MM_findObj(args[2])) != null && !img.MM_init) {
      img.MM_init = true; img.MM_up = args[3]; img.MM_dn = img.src;
      if ((nbArr = document[grpName]) == null) nbArr = document[grpName] = new Array();
      nbArr[nbArr.length] = img;
      for (i=4; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null) {
        if (!img.MM_up) img.MM_up = img.src;
        img.src = img.MM_dn = args[i+1];
        nbArr[nbArr.length] = img;
    } }
  } else if (event == "over") {
    document.MM_nbOver = nbArr = new Array();
    for (i=1; i < args.length-1; i+=3) if ((img = MM_findObj(args[i])) != null) {
      if (!img.MM_up) img.MM_up = img.src;
      img.src = (img.MM_dn && args[i+2]) ? args[i+2] : ((args[i+1])? args[i+1] : img.MM_up);
      nbArr[nbArr.length] = img;
    }
  } else if (event == "out" ) {
    for (i=0; i < document.MM_nbOver.length; i++) {
      img = document.MM_nbOver[i]; img.src = (img.MM_dn) ? img.MM_dn : img.MM_up; }
  } else if (event == "down") {
    nbArr = document[grpName];
    if (nbArr)
      for (i=0; i < nbArr.length; i++) { img=nbArr[i]; img.src = img.MM_up; img.MM_dn = 0; }
    document[grpName] = nbArr = new Array();
    for (i=2; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null) {
      if (!img.MM_up) img.MM_up = img.src;
      img.src = img.MM_dn = (args[i+1])? args[i+1] : img.MM_up;
      nbArr[nbArr.length] = img;
  } }
}

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_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
	features = "toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,modal=yes,top=50,left=80," + features;
	window.open(theURL,winName,features);
}

function MM_setTextOfLayer(objId,x,newText) { //v9.0
  if (document.getElementById(objId)!=null)
	document.getElementById(objId).innerHTML = newText;
}

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 openwin(win_url) {
	window.open(win_url);
}

function popupC(link_a){
	temp= window.open(link_a, "NewWindow", "toolbar=0, status=0, munubar=0, scrollbars=1, width=350, height=400");
}

function check_email(str) {
	return (str.indexOf(".") > 2) && (str.indexOf("@") > 0 && str.indexOf(".") > str.indexOf("@")+1);
}

function trim(stringToTrim)
{
	return stringToTrim.replace(/^\s+|\s+$/g,"");
}

function check_qform(frm) {
	if (trim(document.qform.name.value) == "") {
		alert("Please input your name");
		return false;
	} else if (!check_email(document.qform.email.value)) {
		alert("Please input your valid email address");
		return false;
	} else if (trim(document.qform.dayno.value) == "" && trim(document.qform.nightno.value) == "") {
		alert("Please input your contact number");
		return false;
	} else if (trim(document.qform.query.value) == "") {
		alert("Please input your comments");
		return false;
	} else {
		document.qform.submit();
		return true;
	}
}

function check_qformc(frm) {
	if (trim(document.qform.name.value) == "") {
		alert("請輸入閣下的姓名");
		return false;
	} else if (!check_email(document.qform.email.value)) {
		alert("請輸入正確的電郵地址");
		return false;
	} else if (trim(document.qform.dayno.value) == "" && trim(document.qform.nightno.value) == "") {
		alert("請輸入閣下的聯絡電話");
		return false;
	} else if (trim(document.qform.query.value) == "") {
		alert("請填寫閣下的意見");
		return false;
	} else {
		document.qform.submit();
		return true;
	}
}

function gen_header1() {
	document.write("<table height=94 cellpadding=0 width=760 border=0 cellspacing=0>");
	document.write("<tr valign=top align=left>");
	document.write("<td class=sidebar background=../../../Library/images/bkgdtexture.gif height=65><img height=65 src=\"../../Library/images/branding.gif\" width=484 alt=\"The Government of the Hong Kong Special Administrative Region - Food and Environmental Hygiene Department\"> </td>");
	document.write("<td width=105 background=../../../Library/images/bkgdtexture.gif height=65>&nbsp;</td>");
	document.write("<td background=../../../Library/images/bkgdtexture.gif height=65><a href=\"http://www.brandhk.gov.hk/brandhk/eindex.htm\" target=_blank><img tabindex=1 height=60 alt=\"Brand Hong Kong\" src=\"../../Library/images/brandhk_e.gif\" width=190 border=0 name=BrandHK></a></td>");
	document.write("</tr>");
	document.write("<tr valign=top align=left>");
	document.write("<td height=20 colspan=\"4\" valign=\"bottom\" background=../../../Library/images/bkgdtexture.gif><a onMouseOver=\"MM_swapImage('mainbar1','','../../Library/images/tc_mainbar1_f2.gif',1)\" onMouseOut=MM_swapImgRestore() href=\"http://www.gov.hk/en/residents/\" target=\"_blank\"> </a>");
	document.write("<table width=\"100%\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\">");
	document.write("<form name=\"form1\" action=\"http://search.gov.hk/search.html\" method=\"get\">");
	document.write("<input type=\"hidden\" name=\"tpl_id\" value=\"stdsearch\">");
	document.write("<input type=\"hidden\" name=\"ui_lang\" value=\"en\">");
	document.write("<input type=\"hidden\" name=\"ui_charset\" value=\"big5\">");
	document.write("<input type=\"hidden\" name=\"gp0\" value=\"fehd_home\">");
	document.write("<input type=\"hidden\" name=\"gp1\" value=\"fehd_home\">");
	document.write("<input type=\"hidden\" name=\"web\" value=\"this\">");
	document.write("<tr>");
	document.write("<td width=\"507\" align=\"left\" valign=\"bottom\"><a onMouseOver=\"MM_swapImage('mainbar1','','../../Library/images/tc_mainbar1_f2.gif',1)\" onMouseOut=MM_swapImgRestore() href=\"http://www.gov.hk/en/residents/\" target=\"_blank\"><img src=\"../../Library/images/tc_mainbar1.gif\" alt=\"GovHK: Residents\" name=mainbar1 width=170 height=20 border=0 align=\"top\" tabindex=2></a><a onMouseOver=\"MM_swapImage('mainbar31','','../../Library/images/mainbar3_f2bb.gif',1)\" onMouseOut=MM_swapImgRestore() href=\"javascript:langSwitch('tch');\"><img src=\"../../Library/images/mainbar3%202b.gif\" alt=\"Traditional Chinese\" name=mainbar31 width=51 height=20 border=0 align=\"top\" tabindex=3></a><a href=\"javascript:langSwitch('sch');\" onMouseOut=\"MM_swapImgRestore()\" onMouseOver=\"MM_swapImage('Image11','','../../Library/images/mainbar4_f2bb.gif',1)\"><img src=\"../../Library/images/mainbar4%202b.gif\" alt=\"Simplified Chinese\" name=\"Image11\" width=\"50\" height=\"20\" border=\"0\" align=\"top\"></a><img src=\"../../Library/images/mainbar5.gif\" alt=\"\" name=mainbar5 width=80 height=20 border=0 align=\"top\"></td>");
	document.write("<td width=\"55\" align=\"right\"><a href=\"javascript:document.forms[0].submit()\" target=\"_blank\" onMouseOver=\"MM_swapImage('mainbar6','','../../Library/images/mainbar6_f2.gif',1)\" onMouseOut=MM_swapImgRestore()><img src=\"../../Library/images/mainbar6.gif\" alt=Search  name=mainbar6 width=54 height=20 border=0 align=\"top\" tabindex=4></a>&nbsp;</td>");
	document.write("<td width=\"23\" align=\"right\"><input tabindex=\"5\" class=\"search\" size=\"12\" name=\"query\"></td>");
	document.write("<td width=\"22\" align=\"right\"><a href=\"javascript:document.forms[0].submit()\" onMouseOver=\"MM_swapImage('search','','../../Library/images/mainbar8_f2.gif',1)\" onMouseOut=MM_swapImgRestore()><img src=\"../../Library/images/mainbar8.gif\" alt=Search name=search width=22 height=20 border=0 align=\"top\" class=\"header\" tabindex=6></a></td>");
	document.write("<td width=\"66\" align=\"right\"><a onMouseOver=\"MM_swapImage('mainbar9','','../../Library/images/mainbar9_f2.gif',1)\" onMouseOut=MM_swapImgRestore() href=\"../../sitemap/index.html\"><img src=\"../../Library/images/mainbar9.gif\" alt=\"Site Map\" name=mainbar9 width=65 height=20 border=0 align=\"top\" tabindex=7></a>&nbsp;</td>");
	document.write("<td width=\"37\"><a onMouseOver=\"MM_swapImage('mainbar10','','../../Library/images/mainbar10_f2.gif',1)\" onMouseOut=MM_swapImgRestore()  href=\"../../comments/contact_us.html\"><img src=\"../../Library/images/mainbar10.gif\" alt=\"Contact Us\" name=mainbar10 width=36 height=20 border=0 align=\"top\" tabindex=8></a>&nbsp;</td>");
	document.write("</tr>");
	document.write("</form>");
	document.write("</table></td>");
	document.write("</tr>");
	document.write("<tr valign=top align=left bgcolor=#cc3333>");
	document.write("<td colspan=4 height=2><img height=1 src=\"../../Library/images/reddot.gif\" width=1 alt=\"red\"></td>");
	document.write("</tr>");
	document.write("<td height=\"2\">");
	document.write("</table>");
}

function gen_footer(lang) {
	s = new Date();	
	document.write(s.getFullYear());
	
	if (lang == 'e') {
		document.write("<img height=\"11\" src=\"/Library/images/copy.gif\" width=\"12\" alt=\"\"> | ");
		//document.write("<a href=../../js//"/department/copyright.html/">Important notices</a>");
		document.write("<a href=\"/english/department/copyright.html\">Important notices</a> | ");
		document.write("<a href=\"/english/department/privacy.html\">Privacy Policy</a>");
	} else if (lang == 'c') {
		document.write("<img height=\"11\" src=\"/Library/images/copy.gif\" width=\"12\" alt=\"\"> | ");
		//document.write("<a href=../../js//"/department/copyright.html/">重要聲明</a>");
		document.write("<a href=\"/tc_chi/department/copyright.html\">重要聲明</a> | ");
		document.write("<a href=\"/tc_chi/department/privacy.html\">私隱政策</a>");
	}
}

function isUrlValid (url_path, content, lang) {
	var AJAX = null;				// Initialize the AJAX variable.
	var url = url_path;
	
	AJAX = openAjax();
	
	AJAX.onreadystatechange = function() {                      	// When the browser has the request info..
		if (AJAX.readyState==4 || AJAX.readyState=="complete") { 		//  see if the complete flag is set.
			if (AJAX.status  == 404) {
				if (content == "map")
					//document.location.href = "cfs_press_archive_error_" + lang + ".html";
					if (lang == "c")
						alert ("Sorry！沒有相關資料，請重新選擇");
					else if (lang == "e")
						alert ("Sorry! There is no relative information, please try again.");
					else if (lang == "s")
						alert ("抱歉！?有相??料，?重新??");
				return false;
			} else {
				document.location.href = url_path;
				return true;
			}
		}                                                      	
	}
	
	AJAX.open("GET", url, true);	
	AJAX.send(null);
}

function chi_but() {
	var cur_loc = document.location.pathname;
	
	// URL for simplified chinese pages
	if (location.href.toString().search('/gb/')!=-1) {
		document.write('<a href="javascript:document.location.href=location.href.toString().replace(\'sc.info.gov.hk/gb/\',\'\');" onMouseOut="MM_swapImgRestore()" onMouseOver="MM_swapImage(\'Image11\',\'\',\'/Library/images/mainbar3_f2bb.gif\',1)" onFocus="" onBlur=""><img src="/Library/images/mainbar3 2b.gif" alt="繁體版" name="Image11" width="50" height="20" border="0" align="top"></a>');
	} else {
		// URL for traditional chinese pages in intranet & internet site
		if (location.href.toString().search('www')!=-1) {
			document.write('<a href="http://sc.info.gov.hk/gb/www.fehd.gov.hk'+cur_loc+'" onMouseOut="MM_swapImgRestore()" onMouseOver="MM_swapImage(\'Image11\',\'\',\'/Library/images/mainbar4_f2bb.gif\',1)" onFocus="" onBlur=""><img src="/Library/images/mainbar4 2b.gif" alt="簡體版" name="Image11" width="50" height="20" border="0" align="top"></a>');
		// URL for traditional chinese pages in testing site
		} else {
			document.write('<a href="http://sc.info.gov.hk/gb/www0.fehd.gov.hk'+cur_loc+'" onMouseOut="MM_swapImgRestore()" onMouseOver="MM_swapImage(\'Image11\',\'\',\'/Library/images/mainbar4_f2bb.gif\',1)" onFocus="" onBlur=""><img src="/Library/images/mainbar4 2b.gif" alt="簡體版" name="Image11" width="50" height="20" border="0" align="top"></a>');
		}
	}
}

function langSwitch(lang) {
	var goPath;
	var pagePath=parent.document.location.href;
	
		if (lang=='eng') { //change to English version
			pagePath = pagePath.replace("tc_chi","english");
			pagePath = pagePath.replace("sc_chi","english");
		}
		if (lang=='tch') { //change to traditional chinese version
			pagePath = pagePath.replace("english","tc_chi");
			pagePath = pagePath.replace("sc_chi","tc_chi");

		}
		
		if (lang=='sch') { //change to traditional chinese version
			pagePath = pagePath.replace("english","sc_chi");
			pagePath = pagePath.replace("tc_chi","sc_chi");

		}
		
	parent.document.location=pagePath;
}

function showdate(tempdate) {
	var tempDay = new String(tempdate.getDate());
	var tempMonth = new String((tempdate.getMonth()+1));
	var tempYear = tempdate.getFullYear();

	if ( tempDay.length == 1 ){
		tempDay = "0" + tempDay;
	}
		
	if ( tempMonth.length == 1 ){
		tempMonth = "0" + tempMonth;
	}
	
	document.write( tempDay + "-"+ tempMonth +"-"+ tempYear );
	return true;
}

function showrevisiondate() {

	var revDate=new Date();
	revDate.setFullYear(revision_date.substring(0,4),revision_date.substring(4,6)-1,revision_date.substring(6,8));
	
	var specificDate=new Date();
	specificDate.setDate(specificDate.getDate()-revision_period);
	
	var curDate=new Date();	

	if (revDate < specificDate) {
		showdate(curDate);
	} else {
		showdate(revDate);
	}

	return true;
}

function showrevisiondate2() {

	var global_date = "20110101"; //yyyymmdd

	var revDate=new Date();
	revDate.setFullYear(revision_date.substring(0,4),revision_date.substring(4,6)-1,revision_date.substring(6,8));
	
	var gloDate=new Date();
	gloDate.setFullYear(global_date.substring(0,4),global_date.substring(4,6)-1,global_date.substring(6,8));

	if (revDate < gloDate) {
		showdate(gloDate);
	} else {
		showdate(revDate);
	}

	return true;
}