var windowposx, windowposy;
		function getX(width) {
			windowposx = ((window.screen.width-width)/2);
			return windowposx;
		}
		
		function getY(height) {
			windowposy = ((window.screen.height-height)/2);
			return windowposy;
		}



	/////////////////
	// IsNumericNr //
	/////////////////
    function IsNumericNr(sText) {

      var lValidChars = "0123456789";
      var lIsNumber    = true;
      var lChar;
    
      for (i = 0; i < sText.length && lIsNumber == true; i++) { 
        lChar = sText.charAt(i); 
        if (lValidChars.indexOf(lChar) == -1) {
          lIsNumber = false;
        }
      }
      return lIsNumber;
    }
	
	///////////////
	// IsNumeric //
	///////////////
    function IsNumeric(sText) {

      var lValidChars = "0123456789.";
      var lIsNumber    = true;
      var lChar;
    
      for (i = 0; i < sText.length && lIsNumber == true; i++) { 
        lChar = sText.charAt(i); 
        if (lValidChars.indexOf(lChar) == -1) {
          lIsNumber = false;
        }
      }
      return lIsNumber;
    }