function isBlank( s )
{
	if(trim(s).length == 0)
	{
		return true;
	}
	else
	{
		return false;
	}
}

//Trim
function ltrim ( s )
{
	return s.replace( /^\s*/, "" )
}

function rtrim ( s )
{
	return s.replace( /\s*$/, "" );
}

function trim ( s )
{
	return rtrim(ltrim(s));
}


//email validate
function validateEmail(str)
{
	var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
	if (!filter.test(str))
	{
		return false;
	}
	return true;
}

function isDigit (c)
{
   return ((c >= "0") && (c <= "9"))
}

function isFloat (s)
{
    var decimalPointDelimiter = "."
    var i;
    var seenDecimalPoint = false;

    if (s == decimalPointDelimiter) return false;

    // Search through string's characters one by one
    // until we find a non-numeric character.
    // When we do, return false; if we don't, return true.

    for (i = 0; i < s.length; i++)
    {   
        // Check that current character is number.
        var c = s.charAt(i);

        if ((c == decimalPointDelimiter) && !seenDecimalPoint) seenDecimalPoint = true;
        else if (!isDigit(c)) return false;
    }

    // All characters are numbers.
    return true;
}

function isProper(string) {

   if (!string) return false;
   var iChars = "~!^&+=-*|,:<>[]{}`\';()@&$#%\".";

   for (var i = 0; i < string.length; i++) {
      if (iChars.indexOf(string.charAt(i)) != -1)
         return false;
   }
   return true;
} 

function getOSPlatform()	
{
	var agt=navigator.userAgent.toLowerCase();
    var is_win   = ( (agt.indexOf("win")!=-1) || (agt.indexOf("16bit")!=-1) );
    // NOTE: On Opera 3.0, the userAgent string includes "Windows 95/NT4" on all
    //        Win32, so you can't distinguish between Win95 and WinNT.
    var is_win95 = ((agt.indexOf("win95")!=-1) || (agt.indexOf("windows 95")!=-1));

    // is this a 16 bit compiled version?
    var is_win16 = ((agt.indexOf("win16")!=-1) || 
               (agt.indexOf("16bit")!=-1) || (agt.indexOf("windows 3.1")!=-1) || 
               (agt.indexOf("windows 16-bit")!=-1) );  

    var is_win31 = ((agt.indexOf("windows 3.1")!=-1) || (agt.indexOf("win16")!=-1) ||
                    (agt.indexOf("windows 16-bit")!=-1));

    var is_winme = ((agt.indexOf("win 9x 4.90")!=-1));
    var is_win2k = ((agt.indexOf("windows nt 5.0")!=-1));

    // NOTE: Reliable detection of Win98 may not be possible. It appears that:
    //       - On Nav 4.x and before you'll get plain "Windows" in userAgent.
    //       - On Mercury client, the 32-bit version will return "Win98", but
    //         the 16-bit version running on Win98 will still return "Win95".
    var is_win98 = ((agt.indexOf("win98")!=-1) || (agt.indexOf("windows 98")!=-1));
    var is_winnt = ((agt.indexOf("winnt")!=-1) || (agt.indexOf("windows nt")!=-1));
    var is_win32 = (is_win95 || is_winnt || is_win98 || 
                    ((is_major >= 4) && (navigator.platform == "Win32")) ||
                    (agt.indexOf("win32")!=-1) || (agt.indexOf("32bit")!=-1));

	if(is_win == true)
	{
		if(is_win95 == true){return "win95"; return false;}
		if(is_win16 == true){return "win16"; return false;}
		if(is_win31 == true){return "win31"; return false;}
		if(is_winme == true){return "winme"; return false;}
		if(is_win2k == true){return "win2k"; return false;}
		if(is_win98 == true){return "win98"; return false;}
		if(is_winnt == true){return "winnt"; return false;}
		if(is_win32 == true){return "win32"; return false;}
	}
}

function validateUsername(strString)
{
	var iChars = "`~!@#$%^&*()+=-[]\\\';,./{}|\":<>? ";
	
	for (var i = 0; i < strString.length; i++) 
	{
		if (iChars.indexOf(strString.charAt(i)) != -1) 
		{
		//alert ("Your username has special characters. \nThese are not allowed.\n Please remove them and try again.");
			return false;
		}
	}
	return true;
}


function validateReserveWords(strString)
{
	var myArray = ["admin","webmaster","system","search","email","super","game","test","administrator","consol","contact","help","support","yahoo","gender","male","female","link","machine","technology","agent"];
	for (var i = 0; i < myArray.length; i++) 
	{
		if(strString.toUpperCase() == myArray[i].toUpperCase()) 
		{
			//alert ("Your username has special characters. \nThese are not allowed.\n Please remove them and try again.");
			return false;
		}
	}
	return true;
}


function validateValgur(strString)
{
	var myArray = ["Sex","Shit","fuck","puSSy","MAD","cunt","nude","naked","asshole","busterd","bastard","cocksucker","porn","dick","Chudi","madarchod","benchod","lund","fakir","chut","chutiya","lauda","bhosda","bully","gand","rand","vaishya","chinal","fodya","penis","vagina","fucker","motherfucker","lier","miser","spy","kutiya","kutta","bhos","bhosad","idiot","stupid","bhadwa"];
	for (var i = 0; i < myArray.length; i++) 
	{
		if(strString.toUpperCase() == myArray[i].toUpperCase()) 
		{
			//alert ("Your username has special characters. \nThese are not allowed.\n Please remove them and try again.");
			return false;
		}
	}
	return true;
}

//validate image upload file type extensions
//call e.g.	if(!TestFileType(this.frmUploadImg.fileUpload.value, ['gif', 'jpg', 'png', 'jpeg']))
function TestFileType( fileName, fileTypes ) {
	if (!fileName) return;
	
	dots = fileName.split(".")
	
	//get the part AFTER the LAST period.
	fileType = "." + dots[dots.length-1];
	//CONVERT FILETYPE IN lower case AS JAVASCRIPT IS CASE SENSITIVE.
	fileType = fileType.toLowerCase();
	//alert(fileType);
	return (fileTypes.join(".").indexOf(fileType) != -1) ? true : false;
}

	function selectdatabasevalue(toselect,cmb) //compares value not text
	{
		for(i=0;i<eval(cmb).length;i++)
		{
			if(eval(cmb).options[i].value.toUpperCase()==toselect.toUpperCase())
			{
				eval(cmb).selectedIndex = i;
			}
		}
	}


function openExit(sPageUrl)
{
	if(window.screenLeft >= 10004)
 	{
		var nwindow = window.open(sPageUrl,'','width=800,height=270');
		nwindow.moveTo(screen.availWidth/2-400,screen.availHeight/2-135);
	}
}

//check date validation
function checkdate(dateField)
{
// ------------- Checking for date in MM/DD/YYYY format ---------------------

	var expirydate="";
	var date="";
	var month="";
	var year="";
	expirydate = dateField;
	month=expirydate.substring(0,expirydate.indexOf("/"));
	date=expirydate.substring((expirydate.indexOf("/")+1),expirydate.indexOf("/",(expirydate.indexOf("/")+2)));
	year=expirydate.substring((expirydate.lastIndexOf("/")+1));

	if(expirydate.indexOf("/")==-1)
	{
		alert("Invalid Date Format");
		return false;
	}

	if(isNaN(date) || isNaN(month) || isNaN(year))
	{
		alert("Enter Date In Numerics Only");
		return false;
	}

	if(date > 31 || date < 1)
	{
		alert("Invalid Date Of Month");
		return false;
	}

	if(month > 12 || month < 1)
	{
		alert("Invalid Month");
		return false;
	}

	if(year < 1850 || year > 5002)
	{
		alert("Invalid Year");
		return false;
	}

	if(month == 4 || month == 6 || month == 9 || month == 11)
	{
		if(date > 30)
		{
			alert("Invalid Date Of Month")
			return false;
		}
	}

	if(month == 2)
	{
//----------- checking for leap year-------------
		var lyear=year-1848
		if((lyear%4==0) && (date<30))
		{
			if(date > 29)
			{
				alert("Invalid Date Of Month")
				return false;
			}
			//alert("leap year")
		}
		else if(date > 28)
		{
			alert("Invalid Date Of Month")
			return false;
		}
	}
	
	return true;

}


function textCounter(field, countfield, maxlimit) {
if (field.value.length > maxlimit) // if too long...trim it!
field.value = field.value.substring(0, maxlimit);
// otherwise, update 'characters left' counter
else 
countfield.value = maxlimit - field.value.length;
}