function Trim(TRIM_VALUE)
{
	if(TRIM_VALUE.length < 1)
	{
		return"";
	}
	TRIM_VALUE = RTrim(TRIM_VALUE);
	TRIM_VALUE = LTrim(TRIM_VALUE);
	if(TRIM_VALUE=="")
	{
		return "";
	} else {
		return TRIM_VALUE;
	}
}

function RTrim(VALUE)
{
	var w_space = String.fromCharCode(32);
	var w_tab = String.fromCharCode(9);
	var w_nl = String.fromCharCode(10);
	var w_cr = String.fromCharCode(13);
	
	var v_length = VALUE.length;
	var strTemp = "";
	if(v_length < 0)
	{
		return"";
	}
	var iTemp = v_length -1;
	while(iTemp > -1)
	{
		if ( VALUE.charAt(iTemp) == w_space || VALUE.charAt(iTemp) == w_tab || VALUE.charAt(iTemp) == w_nl || VALUE.charAt(iTemp) == w_cr )
		{
		} else {
			strTemp = VALUE.substring(0,iTemp +1);
			break;
		}
		iTemp = iTemp-1;
	} //End While
	return strTemp;
} //End Function

function LTrim(VALUE)
{
	var w_space = String.fromCharCode(32);
	var w_tab = String.fromCharCode(9);
	var w_nl = String.fromCharCode(10);
	var w_cr = String.fromCharCode(13);
	if(v_length < 1)
	{
		return"";
	}
	var v_length = VALUE.length;
	var strTemp = "";

	var iTemp = 0;

	while(iTemp < v_length)
	{
		if ( VALUE.charAt(iTemp) == w_space || VALUE.charAt(iTemp) == w_tab || VALUE.charAt(iTemp) == w_nl || VALUE.charAt(iTemp) == w_cr )
		{
		} else {
			strTemp = VALUE.substring(iTemp,v_length);
			break;
		}
		iTemp = iTemp + 1;
	} //End While
	return strTemp;
}
function isEmail(str) 
{
	if (str == '')
		return true;
		// check empty strings externally
		
	var at="@";
	var dot=".";
	var space = " ";
	var lat=str.indexOf(at);
	var lstr=str.length;
	var ldot=str.indexOf(dot);
	if (str.indexOf(space) != -1)
	{
		return false;
	}
	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					
}

function isURL(str) 
{
	if (str.indexOf(" ") != -1)
		return false;
	else if (str.indexOf("http://") == -1 && str.indexOf("https://") == -1 && str.indexOf("ftp://") == -1)
		return false;
	else if (str == "http://" || str == "https://" || str == "ftp://")
		return false;
	
	if (str.indexOf("http://") != 0 && str.indexOf("https://") != 0 && str.indexOf("ftp://") != 0)
		return false;

	str = str.substring(7, str.length);
	if (str.indexOf(".") == -1)
		return false;
	else if (str.indexOf(".") == 0)
		return false;
	else if (str.charAt(str.length - 1) == ".")
		return false;

	if (str.indexOf("/") != -1) 
	{
		str = str.substring(0, str.indexOf("/"));
		if (str.charAt(str.length - 1) == ".")
			return false;
	}

	if (str.indexOf(":") != -1) 
	{
		if (str.indexOf(":") == (str.length - 1))
			return false;
		else if (str.charAt(str.indexOf(":") + 1) == ".")
			return false;
		str = str.substring(0, str.indexOf(":"));
		if (str.charAt(str.length - 1) == ".")
			return false;
	}
	return true;
}

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(str)
{
	var daysInMonth = DaysArray(12)
	var pos1=str.indexOf('/')
	var pos2=str.indexOf('/',pos1+1)
	var strMonth=str.substring(0,pos1)
	var strDay=str.substring(pos1+1,pos2)
	var strYear=str.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('1');
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert('2');
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert('3');
		return false
	}
	if (strYear.length != 2 && strYear.length != 4){
		alert('4');
		return false
	}
	if (str.indexOf('/',pos2+1)!=-1 || isInteger(stripCharsInBag(str, '/'))==false){
		alert('5');
		return false
	}
	return true
}

function isTime(str)
{
	colon = 0;
	hour = 'x';
	min = 'x';
	sec = 'x';
	for(i=0;i<str.length;i++)
	{
		if (isInteger(str.charAt(i))) 
		{
			if (colon == 0) 
			{
				hour += str.charAt(i);
			} else if (colon == 1) {
				min += str.charAt(i);
			} else if (colon == 2) {
				sec += str.charAt(i);
			}
		} else if (str.charAt(i) != ':') {
			return false;
		} else {
			colon++;
			if (colon > 2)
			{
				return false;
			}
		}
	}
	if (hour.length < 2) {
		return false;
	} else if (min.length < 3) {
		return false;
	} else if (colon > 1 && sec.length < 3) {
		return false;
	}
	return true;
}