function isNumber(a)
{
	var bType = (typeof a == 'number') || (typeof a == 'string'); //IE seems to treat some nums as strings
    return bType && isFinite(a);
}


function LeftTrim(str) 
{
		
	while (str.substring(0,1) == ' ')
	{
		str = str.substring(1, str.length);
	}
	
	
	return str;
}

function RightTrim(str) 
{
	while (str.substring(str.length-1, str.length) == ' ')
	{
		str = str.substring(0,str.length-1);
	}
	return str;
}

function Trim(str)
{
	return LeftTrim(RightTrim(str));
}

function SetCursor(elemID)
{
	var elemID, elem;
	
	elem = document.getElementById(elemID);
	
	elem.style.cursor = "pointer";	
	

}

function IsEventKeyPress(evt, keyCode)
{

	var theEvent = GetEvent(evt);
	
	if (theEvent)
	{
		if (theEvent.keyCode == keyCode)
		{
			return true;
		}
		else
		{
			return false;
		}
			
		
	}
	else
	{
		return false;
	}

}

function GetEvent(evt)
{
	
	var theEvent = (evt) ? evt : ((event) ? event : null);
	
	
	return theEvent;

}

function GetEventElem(evt)
{
	var theEvent = GetEvent(evt);
	
	var elem = (theEvent.target) ? theEvent.target : ((theEvent.srcElement) ? theEvent.srcElement : null);
	if (elem)
	{
		elem = (elem.nodeType == 1 || elem.nodeType == 9) ? elem : elem.parentNode;
	}
	
	return elem;
	
	
}

function CancelEventAction(evt)
{
	
	
	var theEvent = GetEvent(evt);
	
	if (theEvent.returnValue)
	{
	
		theEvent.returnValue = false;
	}
	else if(theEvent.preventDefault)
	{
	
		theEvent.preventDefault();
	}
	
		
	return false;
	
}



/**
 * DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */
// 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)
	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")
		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 isTime(timeStr) 
{
	// Checks if time is in HH:MM:SS AM/PM format.
	// The seconds and AM/PM are optional.

	var timePat = /^(\d{1,2}):(\d{2})(:(\d{2}))?(\s?(AM|am|PM|pm))?$/;

	var matchArray = timeStr.match(timePat);
	if (matchArray == null)
	{
		alert("Time is not in a valid format.");
		return false;
	}
	hour = matchArray[1];
	minute = matchArray[2];
	second = matchArray[4];
	ampm = matchArray[6];

	if (second=="")
	{
		second = null;
	}
	if (ampm=="")
	{
		ampm = null;
	}
	
	if (hour < 0  || hour > 12)
	{
		alert("Hour must be between 1 and 12.");
		return false;
	}
	if (hour <= 12 && ampm == null) 
	{
		//if (confirm("Please indicate which time format you are using.  OK = Standard Time, CANCEL = Military Time"))
		//{
			alert("You must specify AM or PM.");
			return false;
		//}
	}
	//if  (hour > 12 && ampm != null) 
	//{
	//	alert("You can't specify AM or PM for military time.");
	//	return false;
	//}
	
	if (minute<0 || minute > 59) 
	{
		alert ("Minute must be between 0 and 59.");
		return false;
	}
	if (second != null && (second < 0 || second > 59)) 
	{
		alert ("Second must be between 0 and 59.");
		return false;
	}
	
	return true;
}