// Confirmation of deletion                                                            
	   function ConfirmDelete() {                                            
		  if (confirm("Are you sure you wish to delete this record. " +        
			  "\nClick OK to delete or Cancel to avoid deletion.")) {                                   
				return true                                                    
		  } else {                                                             
				return false                                                   
		  }                                                                    
	   } 

// Trim function
	function trim(str)
	{
	   return str.replace(/^\s*|\s*$/g,"");
	}

// Check if string is numeric
	function isNumeric(strString)
	{
	   var strValidChars = "0123456789";
	   var strChar;
	   var blnResult = true;
	
	   if (strString.length == 0) return true;
	
	   //  test strString consists of valid characters listed above
	   for (i = 0; i < strString.length && blnResult == true; i++)
	      {
	      strChar = strString.charAt(i);
	      if (strValidChars.indexOf(strChar) == -1)
	         {
	         blnResult = false;
	         }
	      }
	   return blnResult;
	}

// Check valid characters
	function isValidString(iStr, iValidChars)
	{
	   var strString = iStr;
       var strValidChars = iValidChars;
	   var blnResult = true;
	
	   if (iStr.length == 0) return true;
	
	   //  test strString consists of valid characters listed above
	   for (i = 0; i < strString.length && blnResult == true; i++)
	      {
	      strChar = strString.charAt(i);
	      if (strValidChars.indexOf(strChar) == -1)
	         {
	         blnResult = false;
	         }
	      }
	   return blnResult;
	}

// Check if string is integers
    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;
    }

// Check if a string contains only characters in the bag
    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;
    }

// Date validation - Declaring valid date character, minimum year and maximum year
    var dtCh= "/";
    var minYear=1400;
    var maxYear=2100;

// Date Validation
    function isDate(dtStr)
    {
	    var daysInMonth = DaysArray(12)
	    var pos1=dtStr.indexOf(dtCh)
	    var pos2=dtStr.indexOf(dtCh,pos1+1)
	    var strDay=dtStr.substring(0,pos1)
	    var strMonth=dtStr.substring(pos1+1,pos2)
	    var strYear=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 : dd/mm/yyyy")
		    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
    }

// Date Validation
    function isDateDMY(dtStr)
    {
	    var daysInMonth = DaysArray(12)
	    var pos1=dtStr.indexOf(dtCh)
	    var pos2=dtStr.indexOf(dtCh,pos1+1)
	    var strDay=dtStr.substring(0,pos1)
	    var strMonth=dtStr.substring(pos1+1,pos2)
	    var strYear=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 : dd/mm/yyyy")
		    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
    }

// Date Validation - Calculate the number of days in February given year 
    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 );
    }

// Date Validation - returns an array of days in month
    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
    }

// Check if Time is valid 
    function isTime(strTime)
	{
		tTime=strTime.split(":")
		tester1=/[^:0-9]/
		tester2=/[^0-9]/
		if (tester1.test(strTime) | strTime.length!=5 | strTime.indexOf(":")!=2)
 		{
 			alert("Time incorrect format or length")
			return false
 		}
		else if (tTime[0]>23 | tTime[1]>59 | tester2.test(tTime[0]) | tester2.test(tTime[1]))
 		{
 			alert("Time incorrect hour>23 min>59")
			return false
 		}
	}

// Check if string at valid CPR number
	function isCPR(strString)
	{
        //if (strString.length == 0) return true;
        if(!isNumeric(strString))
        {
            alert("CPR number ... only numeric characters are allowed");
            return false;
        }
        if(strString.length != 10)
        {
            alert("CPR number ... must be 10 characters long");
            return false;
        }
        if(!isDate1(strString.substring(0,6)))
        {
		    alert("An invalid date has been entered in the first 6 characters of the CPR number");
            return false;
        }
        return true;        
	}
	
	// Check date in format ddmmyy with no alerts
	function isDate1(iStr)
	{
	    var daysInMonth = DaysArray(12)
	    var strDay=iStr.substring(0,2)
	    var strMonth=iStr.substring(2,4)
	    var strYear=iStr.substring(4,6)

	    if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	    if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	    if (strYear.charAt(0)=="0" && strYear.length>1) strMonth=strYear.substring(1)

	    day=parseInt(strDay)
	    month=parseInt(strMonth)
	    year=parseInt(strYear)

	    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 != 2){
		    //alert("Year must be 2 digits long")
		    return false
	    }
        return true
	}

	// Validate the email address
	function CheckEmailAddress(str) 
	{
		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   return false
		}
		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   return false
		}
		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    return false
		}
		 if (str.indexOf(at,(lat+1))!=-1){
		    return false
		 }
		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    return false
		 }
		 if (str.indexOf(dot,(lat+2))==-1){
		    return false
		 }
		 if (str.indexOf(" ")!=-1){
		    return false
		 }
 		 return true					
	}

//**************************************************************************************************************
// Menu functions 
//**************************************************************************************************************

    var openId = 0; 
    var timeout	= 250;
    var closetimer	= 0;
    var ddmenuitem	= 0;
    var rMenu = 0;

    // open hidden layer
    function mopen(id)
    {	
	    // cancel close timer
	    mcancelclosetime();

	    // close old layer
	    if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';

	    // get new layer and show it
	    ddmenuitem = document.getElementById(id);
	    ddmenuitem.style.visibility = 'visible';

    }

    // close showed layer
    function mclose()
    {
	    if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
    }

    // go close timer
    function mclosetime()
    {
	    closetimer = window.setTimeout(mclose, timeout);
    }

    // cancel close timer
    function mcancelclosetime()
    {
	    resetMenu();
	    if(closetimer)
	    {
		    window.clearTimeout(closetimer);
		    closetimer = null;
	    }
    }
    
    function resetMenu() 
    {
        if (rMenu == 0) 
        {
            var node_list = document.getElementsByTagName('table');
            for (var i = 0; i < node_list.length; i++) 
            {
                var node = node_list[i];
                var tbl = node.getAttribute("id");
                if (tbl != null)
                {
                    if (tbl.substr(0,3) == "mnu")
                    {
                        if (document.getElementById(tbl) != null) 
                        {
                            document.getElementById(tbl).style.visibility = 'Visible';
                            document.getElementById(tbl).style.visibility = 'Hidden';
                        }
                    }
                }
            } 
            rMenu = 1;
        }
    }

    // close layer when click-out
    document.onclick = mclose; 

//**************************************************************************************************************
// End of menu functions
//**************************************************************************************************************