//去除字串左邊的空白虛格
function ltrim(instr){
	return instr.replace(/^[\s]*/gi,"");
}

//去除字串右邊的空白虛格
function rtrim(instr){
	return instr.replace(/[\s]*$/gi,"");
}

//去除字串前後的空白虛格
function trim(instr){
	instr = ltrim(instr);
	instr = rtrim(instr);
	return instr;
}
function isDecimal(field)
{
	var validTxt = /^[0-9.]+$/
	var msg = "Invalid hour attended";
	
	if (! validTxt.test(field.value)){
		alert(msg);
		return false;
	}else{
		return true;
	}
}
function CompareDates(date1, date2) 
{ 
	//For date format "yyyy-mm-dd"
	var str1  = date1.value;
	var str2  = date2.value;
	var dt1   = parseInt(str1.substring(8,10),10); 
	var mon1  = parseInt(str1.substring(5,7),10);
	var yr1   = parseInt(str1.substring(0,4),10); 
	var dt2   = parseInt(str2.substring(8,10),10); 
	var mon2  = parseInt(str2.substring(5,7),10); 
	var yr2   = parseInt(str2.substring(0,4),10); 
	var date1 = new Date(yr1, mon1, dt1); 
	var date2 = new Date(yr2, mon2, dt2); 
	
	if(date2 < date1){
	  alert("Start date cannot be greater than End date");
	  return false; 
	} 
	else { 
	  return true;
	} 
} 


function profile_validate(frm)
{
 	var answer = confirm("Are you sure ?");
	if (answer == false) {return false;};
	
	with (frm){
		//if (EmptyValidation(username,"User Name is empty")==false) {username.focus(); return false;};
		
		//Password
		if (EmptyValidation(password,"Password is empty")==false) {password.focus(); return false;};
		if (password.value!=cfm_password.value) {alert("Password is not correct!");password.focus(); return false;};
		if (ValidateInput("minlen=6", password, "Password")==false) {password.focus(); return false;};
		if (ValidateInput("maxlen=10", password, "Password")==false) {password.focus(); return false;};
		if (ValidateInput("alnumhyphen", password, "Password")==false) {password.focus(); return false;};
		
		//First Name
		if (EmptyValidation(first_name,"First Name is empty")==false) {first_name.focus(); return false;};
		if (ValidateInput("maxlen=100", first_name, "First Name")==false) {first_name.focus(); return false;};
		
		//Last Name
		if (EmptyValidation(last_name,"Last Name is empty")==false) {last_name.focus(); return false;};
		if (ValidateInput("maxlen=100", last_name, "Last Name")==false) {last_name.focus(); return false;};
		
		//Email
		if (EmptyValidation(email,"Email is empty")==false) {email.focus(); return false;};
		if (ValidateInput("maxlen=100", email, "Email Address")==false) {email.focus(); return false;};
		if (EmailValidation(email.value)==false) {alert("Invalid Email Address");	email.focus(); 	return false;};		
		
		//Contact No.
		if (ValidateInput("maxlen=255", contact_no, "Contact No")==false) {contact_no.focus(); return false;};
		
		//Address
		if (ValidateInput("maxlen=255", Address1, "Address 1")==false) {Address1.focus(); return false;};
		if (ValidateInput("maxlen=255", Address2, "Address 2")==false) {Address2.focus(); return false;};
		if (ValidateInput("maxlen=255", Address3, "Address 3")==false) {Address3.focus(); return false;};
		if (ValidateInput("maxlen=255", Address4, "Address 4")==false) {Address4.focus(); return false;};
	}

	//document.profile_form.submit();
	frm.submit();
}
function register_validate(frm)
{
	with (frm){
		//User Name
		if (EmptyValidation(username,"User Name is empty")==false) {username.focus(); return false;};
		if (ValidateInput("maxlen=50", username, "User Name")==false) {username.focus(); return false;};
		if (ValidateInput("alnumhyphen", username, "User Name")==false) {username.focus(); return false;};
		
		//Password
		if (EmptyValidation(password,"Password is empty")==false) {password.focus(); return false;};
		if (password.value!=cfm_password.value) {alert("Password is not correct!");password.focus(); return false;};
		if (ValidateInput("minlen=6", password, "Password")==false) {password.focus(); return false;};
		if (ValidateInput("maxlen=10", password, "Password")==false) {password.focus(); return false;};
		if (ValidateInput("alnumhyphen", password, "Password")==false) {password.focus(); return false;};
		
		//First Name
		if (EmptyValidation(first_name,"First Name is empty")==false) {first_name.focus(); return false;};
		if (ValidateInput("maxlen=100", first_name, "First Name")==false) {first_name.focus(); return false;};
		
		//Last Name
		if (EmptyValidation(last_name,"Last Name is empty")==false) {last_name.focus(); return false;};
		if (ValidateInput("maxlen=100", last_name, "Last Name")==false) {last_name.focus(); return false;};
		
		//Email
		if (EmptyValidation(email,"Email is empty")==false) {email.focus(); return false;};
		if (ValidateInput("maxlen=100", email, "Email Address")==false) {email.focus(); return false;};
		if (EmailValidation(email.value)==false) {alert("Invalid Email Address");	email.focus(); 	return false;};		
		
		//Contact No.
		if (ValidateInput("maxlen=255", contact_no, "Contact No")==false) {contact_no.focus(); return false;};
		
		//Address
		if (ValidateInput("maxlen=255", Address1, "Address 1")==false) {Address1.focus(); return false;};
		if (ValidateInput("maxlen=255", Address2, "Address 2")==false) {Address2.focus(); return false;};
		if (ValidateInput("maxlen=255", Address3, "Address 3")==false) {Address3.focus(); return false;};
		if (ValidateInput("maxlen=255", Address4, "Address 4")==false) {Address4.focus(); return false;};
	}

	//document.profile_form.submit();
	frm.submit();
}
function schedule_validate(frm, cnt)
{
 	var answer = confirm("Are you sure ?");
	if (answer == false) {return false;};
	 
	var blnSubmit = true;
 	
	with (frm){
		for (var i = 1; i <= cnt; i++){
		 	var sdt = elements['sd'+i];
		 	var edt = elements['ed'+i];
			var ha = elements['hour'+i];
			
			//Check Start Date 	
	 		if (trim(sdt.value) != ""){
		 		if (ValidateDate(sdt) == false){
		 		 	blnSubmit = false;
					break;
				};	
			}
			//Check End Date
			if (trim(edt.value) != ""){
		 		if (ValidateDate(edt) == false){
		 		 	blnSubmit = false;
					break;
				};	
			}
			//Check Start Date <= End Date
			if ((trim(sdt.value) != "") && (trim(edt.value) != "")){
		 		if (CompareDates(sdt, edt) == false){
		 		 	sdt.focus();
		 		 	blnSubmit = false;
					break;
				};	
			}else if ((trim(sdt.value) == "") && (trim(edt.value) != "")){
				alert("Start date is empty");
				sdt.focus();
				blnSubmit = false;
				break;
			}else if ((trim(sdt.value) != "") && (trim(edt.value) == "")){
			 	alert("End date is empty");
				edt.focus();
				blnSubmit = false;
				break;
			}
			//Check Hour Attended
	 		/*if (isDecimal(ha) == false){
		 		ha.focus();
		 		blnSubmit = false;
		 		break;
			}*/
	 	}
	}
	if (blnSubmit == true)
	{frm.submit();};
}
function EmptyValidation(entered, alertbox)
{
	with (entered){
		if (value==null || value=="")
		{if (alertbox!="") {alert(alertbox);} return false;}
		else {return true;}
	}
}
function EmailValidation(email)
{
// a very simple email validation checking. 
// you can add more complex email checking if it helps 
	
    if(email.length <= 0)
	{
	  return true;
	}
    var splitted = email.match("^(.+)@(.+)$");
    if(splitted == null) return false;
    if(splitted[1] != null )
    {
      var regexp_user=/^\"?[\w-_\.]*\"?$/;
      if(splitted[1].match(regexp_user) == null) return false;
    }
    if(splitted[2] != null)
    {
      var regexp_domain=/^[\w-\.]*\.[A-Za-z]{2,4}$/;
      if(splitted[2].match(regexp_domain) == null) 
      {
	    var regexp_ip =/^\[\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\]$/;
	    if(splitted[2].match(regexp_ip) == null) return false;
      }// if
      return true;
    }
}

function ValidateInput(strValidateStr,objValue,strObjName) 
{
    var epos = strValidateStr.search("="); 
    var  command  = ""; 
    var  cmdvalue = ""; 
    var  strRej = "";
    if(epos >= 0) 
    { 
     command  = strValidateStr.substring(0,epos); 
     cmdvalue = strValidateStr.substr(epos+1); 
    } 
    else 
    { 
     command = strValidateStr; 
    } 

    switch(command) 
    { 
	    case "minlen": 
	    { 
			if(eval(objValue.value.length) <  eval(cmdvalue)) 
			{
				strRej = strObjName + " : Min. " + cmdvalue + " characters"; 
				alert(strRej);
				return false;                 
			}
			break; 
        }
        case "maxlen": 
	    { 
			if(eval(objValue.value.length) >  eval(cmdvalue)) 
			{
				strRej = strObjName + " : Max. " + cmdvalue + " characters"; 
				alert(strRej);
				return false;                 
			}
			break; 
        }
        case "alnumhyphen":
		{
		  var charpos = objValue.value.search("[^A-Za-z0-9\-_]"); 
		  if(objValue.value.length > 0 &&  charpos >= 0) 
		  { 
				strRej = strObjName + " : Allowed characters are A-Z,a-z,0-9,- and _"; 
				alert(strRej); 
				return false; 
		  }
		  break;
		}
       return true; 
   }
}

/***************************************** Date Validation ***************************************/
// Declaring valid date character, minimum year and maximum year
var dtCh= "-";
var minYear=1900;
var maxYear=2100;

function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}

function isDate(dtStr){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	/*var strMonth=dtStr.substring(0,pos1)
	var strDay=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)*/
	var strYear=dtStr.substring(0,pos1)
	var strMonth=dtStr.substring(pos1+1,pos2)
	var strDay=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		//alert("The date format should be : mm/dd/yyyy")
		alert("The date format should be : yyyy-mm-dd")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Please enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date")
		return false
	}
return true
}

function ValidateDate(dt){
	//var dt=document.frm.txtDate
	//if (isDate(dt.value)==false){
	if (isDate(dt.value)==false){
		dt.focus();
		return false;
	}
    return true;
 }
/***************************************** Date Validation End************************************/