function isFormNumeric(formElem,isInteger,canNegative,defaultValue){
		if (!isNumeric(formElem.value,isInteger,canNegative)) {
			alert("Please enter" + (canNegative ? "" : " positive") + (isInteger ? " integer." : " number."));
			formElem.value = defaultValue;
			formElem.select();
			formElem.focus();
			return false;
		} else if (trim(formElem.value) == "") {
			formElem.value = defaultValue;
		} else {
			formElem.value = trim(formElem.value);
		}
		return true;
	}

	function isFormDecimal(formElem,isInteger,canNegative,defaultValue){
		if (!isNumeric(formElem.value,isInteger,canNegative)) {
			alert("Please enter" + (canNegative ? "" : " positive") + (isInteger ? " integer." : " number."));
			formElem.value = defaultValue;
			formElem.select();
			formElem.focus();
			return false;
		} else if(!chkDecimal(formElem.value,2)) {
			alert("The amount only allows 2 decimal places.");
			formElem.value = defaultValue;
			formElem.select();
			formElem.focus();
			return false;
		} else if (trim(formElem.value) == "") {
			formElem.value = defaultValue;
		} else {
			formElem.value = trim(formElem.value);
		}
		return true;
	}

	function isFormDecimal2(formElem,isInteger,canNegative,defaultValue){
		if (!isNumeric(formElem.value,isInteger,canNegative)) {
			formElem.value = defaultValue;
			formElem.select();
			formElem.focus();
			return false;
		} else if(!chkDecimal(formElem.value,2)) {
			formElem.value = defaultValue;
			formElem.select();
			formElem.focus();
			return false;
		} else if (trim(formElem.value) == "") {
			formElem.value = defaultValue;
		} else {
			formElem.value = trim(formElem.value);
		}
		return true;
	}

	function isNumeric(num,isInteger,canNegative) {
		if (isNaN(num)) {
			return false;
		} else {
			if (isInteger) {
				if(!canNegative)
					return (num.toString().indexOf(".")==-1 && num.toString().indexOf("-")==-1);
				else
					return (num.toString().indexOf(".")==-1);
			} else {
				if(!canNegative)
					return (num.toString().indexOf("-")==-1);
				else
					return true;
			}
		}
	}

	function chkDecimal(num,places){
		if(isNaN(num)||isNaN(places)){
			return false;
		}else{
			var elem = num.split(".");
			if(elem.length>1){
				if(elem[1].length>places){
					return false;
				}else{
					return true;
				}
			}else{
				return true;
			}
		}
	}

	function roundUp(num,places){
		if(isNumeric(num,false,true)){
			if(String(num).indexOf("e") > 0 ){
				num = 0;
			}else if (String(num).indexOf(".") > 0 ){
				if(String(num).substring(String(num).indexOf(".")+1+places,String(num).indexOf(".")+2+places)>=5){
					if(num>=0){
						num = parseFloat(num) + 0.01;
					}else{
						num = parseFloat(num) - 0.01;
					}
				}
				num = String(num).substring(0,String(num).indexOf(".")+1+places);
			}
			return num;
		}else{
			return 0;
		}
	}

	function formatCurrency(num,places){
		if(isNumeric(num,false,true)){
			num = roundUp(num,places);
			if (String(num).indexOf(".") < 0 ){
				num = num + ".";
				for(i=0;i<places;i++){
					num = num + "0";
				}
			}else if(String(num).length-String(num).indexOf(".")-1<places){
				for(i=String(num).length-String(num).indexOf(".")-1;i<places;i++){
					num = num + "0";
				}
			}
			var str1 = String(num).substring(0,String(num).indexOf("."));
			var str2 = String(num).substring(String(num).indexOf("."),String(num).length);
			var str3 = "";
			i = 0;
			for(j=str1.length-1;j>=0;j--){
				if (i%3==0&&i>0&&i<str1.length-1){
					str3 = "," + str3;
				}
				str3 = str1.charAt(j) + str3;
				i++;
			}
			return "$" + str3 + str2;
		}else{
			return "$0.00";
		}
	}

	function isFormDate(formElem) {
		formElem.value = trim(formElem.value);
		if(formElem.value.length>0) {
			var err = 0;
			var date = formElem.value;
			if (date.length != 10) err=1;
			var day		= date.substring(0, 2)		// day
			var slash1	= date.substring(2, 3)		// '/'
			var month	= date.substring(3, 5)	// month
			var slash2	= date.substring(5, 6)		// '/'
			var year	= date.substring(6, 10)		// year

			if (slash1 != "/") err=1;
			if (slash2 != "/") err=1;
			if (isNaN(day)) err = 1;
			if (isNaN(month)) err = 1;
			if (isNaN(year)) err = 1;

			if(err==0) {
				if (month<1 || month>12) err = 1
				if (day<1 || day>31) err = 1
				if (year<1900) err = 1
				if (month==4 || month==6 || month==9 || month==11){
					if (day==31) err=1
				}
				if (month==2){
					var g=parseInt(year/4)
					if (isNaN(g)) {
						err=1
					}
					if (day>29) err=1
					if (day==29 && ((year/4)!=parseInt(year/4))) err=1
				}
			}
			if (err==1) {
				alert(formElem.value + " is not a valid date.\nFormat: \"DD/MM/YYYY\"");
				formElem.value = "";
				formElem.focus();
			}
		}
	}

	function isNaD(year,month,day) {
		if (year<1||month<1||month>12||day<1||day>31) {
			return false;
		}
		else {
			if (month==4||month==6||month==9||month==11) {
				if (day==31) {
					return false;
				}
			} else if (month==2) {
				if ((isNumeric(year/4,true) && !isNumeric(year/100,true)) || isNumeric(year/400,true)) {
					if (day>29) {
						return false;
					}
				} else {
					if (day>28) {
						return false;
					}
				}
			}
		}
		return true;
	}

	function adjustDate(yearForm,monthForm,dayForm) {
		if(yearForm.selectedIndex>0 && monthForm.selectedIndex>0) {
			var maxDay = 31;
			var year = yearForm.selectedIndex+parseInt(yearForm.options[1].value,10)-1;
			var month = monthForm.selectedIndex;
			var day = dayForm.selectedIndex;

			if (month==4||month==6||month==9||month==11) {
				maxDay = 30;
			} else if (month==2) {
				if ((isNumeric(year/4,true) && !isNumeric(year/100,true)) || isNumeric(year/400,true)) {
					maxDay = 29;
				} else {
					maxDay = 28;
				}
			}
			setDay(dayForm,maxDay);
			return;
		} else if (yearForm.selectedIndex<1) {
			dayForm.length = 1;
			dayForm.options[0].index = 1;
			dayForm.options[0].value = 0;
			dayForm.options[0].text = "DD";

			monthForm.length = 1;
			monthForm.options[0].index = 1;
			monthForm.options[0].value = 0;
			monthForm.options[0].text = "MM";
		} else {
			dayForm.length = 1;
			dayForm.options[0].index = 1;
			dayForm.options[0].value = 0;
			dayForm.options[0].text = "DD";

			monthForm.length = 13;
			monthForm.options[0].index = 1;
			monthForm.options[0].value = 0;
			monthForm.options[0].text = "MM";

			for (i=1;i<=12;i++) {
				monthForm.options[i].index = i;
				monthForm.options[i].value = i;
				if(i<10) {
					monthForm.options[i].text = "0" + (i);
				} else {
					monthForm.options[i].text = i;
				}
			}
		}
	}

	function setDay(dayForm,dayNum) {
		var restoreIndex = 0;
		if (dayForm.selectedIndex < dayNum) {
			restoreIndex = dayForm.selectedIndex;
		} else {
			restoreIndex = dayNum;
		}
		dayForm.length = dayNum+1;
		dayForm.options[0].index = 1;
		dayForm.options[0].value = 0;
		dayForm.options[0].text = "DD";

		for (i=1;i<=dayNum;i++) {
			dayForm.options[i].index = i;
			dayForm.options[i].value = i;
			if(i<10) {
				dayForm.options[i].text = "0" + (i);
			} else {
				dayForm.options[i].text = i;
			}
		}
		dayForm.selectedIndex = restoreIndex;
		return;
	}

	function checkMaxSize(formElem,maxSize,fieldName){
		if (trim(formElem.value).length > maxSize) {
			alert("The " + fieldName + " cannot be longer than " + maxSize + " characters");
			formElem.focus();
		}
	}

	function exceedMaxSize(sValue,maxSize){
		if (!chkTextLng(sValue,maxSize)) {
			return true;
		}else{
			return false;
		}
	}

	function trim(field) {
		var retval = "";
		retval = field.replace(/^\s+/g, "");	// (\s+) means all white space, (^) means after the start of the line
		retval = retval.replace(/\s+$/g, "");	// ($) means before the end of line
		return retval;
	}

	function fileExtention(filepath) {
		var dotIndex = filepath.lastIndexOf(".");
		if(dotIndex==-1) {
			return "";
		} else {
			return filepath.substring(dotIndex+1,filepath.length);
		}
	}

	function isImageFile(filepath) {
		var image_ext = fileExtention(filepath);
		return image_ext.toUpperCase()=="JPG" || image_ext.toUpperCase()=="GIF";
	}

	function isAllowedImageFile(filepath, fileextention) {
		var image_ext = fileExtention(filepath);
		var breturn=false;
		var arrAllow=fileextention.split(",");
		if (arrAllow.length>1){
			for (var i=0; i<arrAllow.length;i++){
				breturn=breturn || (image_ext.toUpperCase()==arrAllow[i].toUpperCase());
			}
			return breturn;
		}else{
			return image_ext.toUpperCase()=="JPG" || image_ext.toUpperCase()=="GIF";
		}
	}


	function isEmpty(s)	{
		return ((s == null) || (s.length == 0));
	}

    //space character, including space, tab, form feed, line feed.
	function hasOnlyWhitespace(s){
		return (/^\s+$/.test(s));
	}

	function isPositiveInteger(s){
		return (/^\d*$/.test(s));
	}

	function isPositiveNumber(s){
		return (/^(\d*\.?\d*|\.\d+)$/.test(s));
	}

	function isNumber(s){
		return (/^-?(\d*\.?\d*|\.\d+)$/.test(s));
	}

	function isAlphanumeric(s){
		return (/^\w*$/.test(s));
	}

	function isValidCMSLogin(s){
		return (/^[a-zA-Z\.]*$/.test(s));
	}

	function isValidLogin(s){
		return (/^[\w\.]*$/.test(s));
	}

	function isAlphabet(s){
		return (/^[a-zA-Z]*$/.test(s));
	}

	function isAlphanumericSpc(s){
		return (/^[\w\s]*$/.test(s));
	}

	function isEmailAddress(s){
		return (/^[^\s\,\;\'\"]+@[^\s\,\;\'\"]+\.[^\s\,\;\'\"]+$|^$/.test(s));
	}
	
	function isPersent(s){
		return (/^-?(\d*\.?\d*|\.\d+)%?$/.test(s));
	}

	function trimAllFields(thisform) {
		var formlen = thisform.elements.length;
		for (i=0; i<formlen; i++){
			if(thisform.elements[i].type == "text" || thisform.elements[i].type == "textarea"){
				thisform.elements[i].value = trim(thisform.elements[i].value);
			}
		}
	}

	// Check the date range input by user is valid or not
	// the parameter is the form element object(i.e. <SELECT> ojbect), NOT integer

/*	function validDateRange(from_year,from_month,from_day,to_year,to_month,to_day) {
		var int_from_year = parseInt(from_year.options[from_year.selectedIndex].value);
		var int_from_month = parseInt(from_month.options[from_month.selectedIndex].value);
		var int_from_day = parseInt(from_day.options[from_day.selectedIndex].value);
		var int_to_year = parseInt(to_year.options[to_year.selectedIndex].value);
		var int_to_month = parseInt(to_month.options[to_month.selectedIndex].value);
		var int_to_day = parseInt(to_day.options[to_day.selectedIndex].value);
		return !(int_from_year>int_to_year || (int_from_year==int_to_year && int_from_month>int_to_month) ||
				(int_from_year==int_to_year && int_from_month==int_to_month && int_from_day>int_to_day));
	}*/

	// the parameter is the date string in dd/mm/yyyy format
	function validDateRange(date_from, date_to) {
		var int_from_year = parseInt(date_from.substring(6,10),10);
		var int_from_month = parseInt(date_from.substring(3,5),10);
		var int_from_day = parseInt(date_from.substring(0,2),10);
		var int_to_year = parseInt(date_to.substring(6,10),10);
		var int_to_month = parseInt(date_to.substring(3,5),10);
		var int_to_day = parseInt(date_to.substring(0,2),10);
		return !(int_from_year>int_to_year || (int_from_year==int_to_year && int_from_month>int_to_month) ||
				(int_from_year==int_to_year && int_from_month==int_to_month && int_from_day>int_to_day));
	}

	// the parameter is the date string in dd/mm/yyyy format
	function validBoundedDateRange(date_from, date_to, bound_from, bound_to) {
		var int_from_year = parseInt(date_from.substring(6,10),10);
		var int_from_month = parseInt(date_from.substring(3,5),10);
		var int_from_day = parseInt(date_from.substring(0,2),10);
		var int_to_year = parseInt(date_to.substring(6,10),10);
		var int_to_month = parseInt(date_to.substring(3,5),10);
		var int_to_day = parseInt(date_to.substring(0,2),10);
		var int_b_from_year = parseInt(bound_from.substring(6,10),10);
		var int_b_from_month = parseInt(bound_from.substring(3,5),10);
		var int_b_from_day = parseInt(bound_from.substring(0,2),10);
		var int_b_to_year = parseInt(bound_to.substring(6,10),10);
		var int_b_to_month = parseInt(bound_to.substring(3,5),10);
		var int_b_to_day = parseInt(bound_to.substring(0,2),10);
		return !(int_from_year<int_b_from_year || int_to_year>int_b_to_year || 
				(int_from_year==int_b_from_year && int_from_month<int_b_from_month) || (int_to_year==int_b_to_year && int_to_month>int_b_to_month) ||
				(int_from_year==int_b_from_year && int_from_month==int_b_from_month && int_from_day<int_b_from_day) ||
				(int_to_year==int_b_to_year && int_to_month==int_b_to_month && int_to_day>int_b_to_day));
	}



	function chkTextLng(fldValue,fldSize){
		var arr = escape(trim(fldValue)).split("%0D%0A");
		var ttlLng = 0;
		for(i=0;i<arr.length;i++){
			ttlLng += unescape(arr[i]).length;
		}
		if(parseInt(ttlLng)>parseInt(fldSize)){
			return false;
		}else{
			return true;
		}
	}

	 function getElById(idVal) {
		if (document.getElementById != null)
	    		return document.getElementById(idVal)
	  	if (document.all != null)
	    		return document.all[idVal]
		  return null
	}

	function getSelID(obj){
		for(i=0;i<obj.length;i++){
			if(obj.options[i].selected){
				return obj.options[i].value;
			}
		}
	}

	function getSelText(obj){
		for(i=0;i<obj.length;i++){
			if(obj.options[i].selected){
				return obj.options[i].text;
			}
		}
	}

	function isChk(frm,elemNm,sclk){
		var frmlen = frm.elements.length;
		var cnt = 0;
		for (i=0; i<frmlen; i++){
			if(frm.elements[i].type == "checkbox"&&frm.elements[i].name==elemNm){
				if(frm.elements[i].checked){
					cnt++;
				}
			}
		}
		if(sclk){
			return cnt==1;
		}else{
			return cnt>0;
		}
	}

	function getChkVal(frm,elemNm){
		var frmlen = frm.elements.length;
		var val = "";
		var j = 0;
		for (i=0; i<frmlen; i++){
			if(frm.elements[i].type == "checkbox"&&frm.elements[i].name==elemNm){
				if(frm.elements[i].checked){
					if(j>0){
						val+=",";
					}
					val+=frm.elements[i].value;
					j++;
				}
			}
		}
		return val;
	}

	function onCheckAll(e) {
		var d = e.form;
		for(i=0;i<d.elements.length;i++) {
			if(d.elements[i].type=="checkbox" && d.elements[i]!=e)
				d.elements[i].checked = e.checked;
		}
	}

	function onCheckAllSpec(e,fld) {
		var d = e.form;
		for(i=0;i<d.elements.length;i++) {
			if(d.elements[i].type=="checkbox" && d.elements[i]!=e && d.elements[i].name==fld)
				d.elements[i].checked = e.checked;
		}
	}

	function onCheckAllSpecByID(e,fid) {
		var d = e.form;
		for(i=0;i<d.elements.length;i++) {
			if(d.elements[i].type=="checkbox" && d.elements[i]!=e && d.elements[i].id==fid)
				d.elements[i].checked = e.checked;
		}
	}

	function onCheckAllSpecBySubID(e,fid) {
		var d = e.form;
		for(i=0;i<d.elements.length;i++) {
			if(d.elements[i].type=="checkbox" && d.elements[i]!=e && d.elements[i].id.indexOf(fid + "!") >= 0)
				d.elements[i].checked = e.checked;
		}
	}

	function replaceAll(val,fnd,rep){
		var rtn = "";
		var cnt=0;
		if(trim(val).length>0){
			var arr = trim(val).split(fnd);
			if(arr.length>0){
				for(cnt=0;cnt<arr.length;cnt++){
					if(cnt>0){
						rtn += rep;
					}
					rtn += arr[cnt];
				}
			}else{
				rtn=val;
			}
		}
		return rtn;
	}

	function isHkid(elem){
		if(trim(elem.value).length>0){
			if(!(/^[a-zA-Z]{1}\d{6}\([\a\A\d]{1}\)$/.test(elem.value))){
				alert("The format of the HKID is invalid.");
				elem.value="";
				elem.focus();
			}
		}
	}
	
	function isValidHKID(sInput, sDigit){
		if(trim(sDigit).length>0){
			if(trim(sInput).length>0){
				if(!(/^[a-zA-Z]{1}\d{6}$/.test(sInput))){
					return false;
				}else{
					var L1 = getCharNum(sInput.substr(0,1)) * 8;
					var L2 = 0;
					for (var i=1;i<sInput.length;i++){
						L2 = L2 + (8 - i) * parseInt(sInput.substr(i,1),10);
					}
					L1 = L1 + L2;
					L1 = L1 % 11;
					if (L1==0) {
						return (parseInt(sDigit)==0);
					}else{
						return (parseInt(sDigit)==11-L1);
					}
				}
			}else{
				return false;
			}
		}else{
			return false;
		}
	
	}

	function getCharNum(s){
		var result = 0;
		switch (s.toUpperCase()){
		case "A":
			result = 1;
			break;
		case "B":
			result = 2;
			break;
		case "C":
			result = 3;
			break;
		case "D":
			result = 4;
			break;
		case "E":
			result = 5;
			break;
		case "F":
			result = 6;
			break;
		case "G":
			result = 7;
			break;
		case "H":
			result = 8;
			break;
		case "I":
			result = 9;
			break;
		case "J":
			result = 10;
			break;
		case "K":
			result = 11;
			break;
		case "L":
			result = 12;
			break;
		case "M":
			result = 13;
			break;
		case "N":
			result = 14;
			break;
		case "O":
			result = 15;
			break;
		case "P":
			result = 16;
			break;
		case "Q":
			result = 17;
			break;
		case "R":
			result = 18;
			break;
		case "S":
			result = 19;
			break;
		case "T":
			result = 20;
			break;
		case "U":
			result = 21;
			break;
		case "V":
			result = 22;
			break;
		case "W":
			result = 23;
			break;
		case "X":
			result = 24;
			break;
		case "Y":
			result = 25;
			break;
		case "Z":
			result = 26;
			break;
		}
		return result;
	}

	function isValidYr(elem){
		if(trim(elem.value).length>0){
			if(isFormNumeric(elem,true,false,'')){
				if(Number(elem.value)<=1900){
					alert("The entered year earlier than 1900 is not allowed.");
					elem.value="";
					elem.focus();
				}
			}
		}
	}

	function isDateAP(pdate,canPresent,sep) {
		if(trim(pdate).length>0){
			var thedate = new Date();
			var year = thedate.getYear().toString();
			var month = (thedate.getMonth() + 1).toString();
			var day = thedate.getDate().toString();
			if(month.length==1){
				month = "0" + month;
			}
			if(day.length==1){
				day = "0" + day;
			}
			var present = year + month + day;
			var adate = pdate.split(sep);
			pdate = adate[2].toString() + adate[1].toString() + adate[0].toString();
			if(canPresent){
				return Number(pdate) >= Number(present);
			}else{
				return Number(pdate) > Number(present);
			}
		}else{
			return true;
		}
	}

	function isDateAD(pdate1,pdate2,canPresent,sep) {
		if(trim(pdate1).length>0&&trim(pdate2).length>0){
			var adate1 = pdate1.split(sep);
			pdate1 = adate1[2].toString() + adate1[1].toString() + adate1[0].toString();
			var adate2 = pdate2.split(sep);
			pdate2 = adate2[2].toString() + adate2[1].toString() + adate2[0].toString();
			if(canPresent){
				return Number(pdate1) >= Number(pdate2);
			}else{
				return Number(pdate1) > Number(pdate2);
			}
		}else{
			return true;
		}
	}

	function isMYDate(elem){
		if(trim(elem.value).length>0){
			if(!(/^\d{2}\/\d{4}$/.test(elem.value))){
				alert("The format of the date is incorrect.");
				elem.value="";
				elem.focus();
			}else{
				var mth = elem.value.split("/")[0];
				var yer = elem.value.split("/")[1];
				if(Number(mth)==0||Number(mth)>12){
					alert("The month of the date is incorrect.");
					elem.value="";
					elem.focus();
				}else if(Number(yer)<=1900){
					alert("The year of the date earlier than 1900 is not allowed.");
					elem.value="";
					elem.focus();
				}
			}
		}

	}

	function fillZeros(formElem,slength,front){
		if (formElem.value.length > 0 && formElem.value.length<slength){
			var zeros="";
			for (j=0;j<slength-formElem.value.length;j++){
				zeros=zeros+"0";
			}
			if (front) {
				formElem.value =  zeros + formElem.value;
			}else{
				formElem.value = formElem.value + zeros;
			}
		}else{
			formElem.value = formElem.value;
		}
		return true;
	}

	function setFocus(frmObj) {
		frmObj.focus();
	}
	
	function setSelect(frmObj) {
		frmObj.select();
	}
	
	function isChkRadio(frm,elemNm,sclk){
		var frmlen = frm.elements.length;
		var cnt = 0;
		for (i=0; i<frmlen; i++){
			if(frm.elements[i].type == "radio"&&frm.elements[i].name==elemNm){
				if(frm.elements[i].checked){
					cnt++;
				}
			}
		}
		if(sclk){
			return cnt==1;
		}else{
			return cnt>0;
		}
	}

	function isEmailAddressList(s, separator){
		var arr = trim(s).split(separator);
		var b = true;
		for(i=0;i<arr.length;i++){
			b = (b &&isEmailAddress(trim(arr[i])))
		}
		return b;
	}

	// joe added on 20080409 start
	function chkValidString(str){
		if(((str.indexOf(">")) > -1) || ((str.indexOf("<")) > -1)) {
			return false;
		}else{
			return true;
		}
	}
	// joe added on 20080409 end