function IsNumeric(strString)
   //  check for valid numeric strings	
   {
   var strValidChars = "0123456789.-";
   var strChar;
   var blnResult = true;

   if (strString.length == 0) return false;

   //  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;
   }

function IsPosInteger(strString)
   //  check for valid numeric strings	
   {
   var strValidChars = "0123456789";
   var strChar;
   var blnResult = true;

   if (strString.length == 0) return false;

   //  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;
   }
  
// Pops up a generic window
function PopWindow(strWindowName){
	var objForm = document.forms["data_form"];
	var intWidth = 510;
	var intHeight = 500;
	var intWindowWidth = (window.innerWidth) ? (window.innerWidth) : ( (document.body.clientWidth) ? document.body.clientWidth : 0 );
	var intWindowHeight = (window.innerHeight) ? (window.innerHeight) : ( (document.body.clientHeight) ? document.body.clientHeight : 0 );
	var intTop = Math.floor((intWindowHeight / 2) - (intHeight / 2));
	var intLeft = Math.floor((intWindowWidth / 2) - (intWidth / 2));
	var strProperties = "resizable=no,";
	
	// set top and left to zero
	intTop = 50;
	intLeft = 50;
	
	// Set up properties
	strProperties = (strProperties + "width=" + intWidth + ",height=" + intHeight + ",top=" + intTop + ",left=" + intLeft + ",status=yes");
	
	
	objWindow = window.open(
		"", 
		strWindowName, 
		strProperties
		);
		
	// Move the window to the center if it didn't center when openening
	objWindow.moveTo(intLeft, intTop);
		
	objWindow.focus();
}

function PopWindowURL(strWindowName, url){
	var objForm = document.forms["data_form"];
	var intWidth = 510;
	var intHeight = 500;
	var intWindowWidth = (window.innerWidth) ? (window.innerWidth) : ( (document.body.clientWidth) ? document.body.clientWidth : 0 );
	var intWindowHeight = (window.innerHeight) ? (window.innerHeight) : ( (document.body.clientHeight) ? document.body.clientHeight : 0 );
	var intTop = Math.floor((intWindowHeight / 2) - (intHeight / 2));
	var intLeft = Math.floor((intWindowWidth / 2) - (intWidth / 2));
	var strProperties = "resizable=no,";
	
	// set top and left to zero
	intTop = 50;
	intLeft = 50;
	
	// Set up properties
	strProperties = (strProperties + "width=" + intWidth + ",height=" + intHeight + ",top=" + intTop + ",left=" + intLeft + ",status=yes");
	
	
	objWindow = window.open(
		url, 
		strWindowName, 
		strProperties
		);
		
	// Move the window to the center if it didn't center when openening
	objWindow.moveTo(intLeft, intTop);
		
	objWindow.focus();
}

function PopWindowList(strWindowName){
	var objForm = document.forms["data_form"];
	var intWidth = 510;
	var intHeight = 500;
	var intWindowWidth = (window.innerWidth) ? (window.innerWidth) : ( (document.body.clientWidth) ? document.body.clientWidth : 0 );
	var intWindowHeight = (window.innerHeight) ? (window.innerHeight) : ( (document.body.clientHeight) ? document.body.clientHeight : 0 );
	var intTop = Math.floor((intWindowHeight / 2) - (intHeight / 2));
	var intLeft = Math.floor((intWindowWidth / 2) - (intWidth / 2));
	var strProperties = "resizable=no,scrollbars=yes,";
	
	// set top and left to zero
	intTop = 50;
	intLeft = 50;
	
	// Set up properties
	strProperties = (strProperties + "width=" + intWidth + ",height=" + intHeight + ",top=" + intTop + ",left=" + intLeft + ",status=yes");
	
	
	objWindow = window.open(
		"", 
		strWindowName, 
		strProperties
		);
		
	// Move the window to the center if it didn't center when openening
	objWindow.moveTo(intLeft, intTop);
		
	objWindow.focus();
}

function PopWindowListURL(strWindowName, url){
	var objForm = document.forms["data_form"];
	var intWidth = 510;
	var intHeight = 500;
	var intWindowWidth = (window.innerWidth) ? (window.innerWidth) : ( (document.body.clientWidth) ? document.body.clientWidth : 0 );
	var intWindowHeight = (window.innerHeight) ? (window.innerHeight) : ( (document.body.clientHeight) ? document.body.clientHeight : 0 );
	var intTop = Math.floor((intWindowHeight / 2) - (intHeight / 2));
	var intLeft = Math.floor((intWindowWidth / 2) - (intWidth / 2));
	var strProperties = "resizable=no,scrollbars=yes,";
	
	// set top and left to zero
	intTop = 50;
	intLeft = 50;
	
	// Set up properties
	strProperties = (strProperties + "width=" + intWidth + ",height=" + intHeight + ",top=" + intTop + ",left=" + intLeft + ",status=yes");
	
	
	objWindow = window.open(
		url, 
		strWindowName, 
		strProperties
		);
		
	// Move the window to the center if it didn't center when openening
	objWindow.moveTo(intLeft, intTop);
		
	objWindow.focus();
}

// Swaps images 
function SwapImages() {
	var Args = arguments;
	
	for (var i = 0 ; i < Args.length ; i+=2) {
		document.images[ Args[i] ].src = Args[i+1].src;
	 }
 }
 
/*-------------------------------------------------------------------- 
 * javascript method: "pxToEm"
 * by:
   Scott Jehl (scott@filamentgroup.com) 
   Maggie Wachs (maggie@filamentgroup.com)
   http://www.filamentgroup.com
 *
 * Copyright (c) 2008 Filament Group
 * Dual licensed under the MIT (filamentgroup.com/examples/mit-license.txt) and GPL (filamentgroup.com/examples/gpl-license.txt) licenses.
 *
 * Description: Extends the native Number and String objects with pxToEm method. pxToEm converts a pixel value to ems depending on inherited font size.  
 * Article: http://www.filamentgroup.com/lab/retaining_scalable_interfaces_with_pixel_to_em_conversion/
 * Demo: http://www.filamentgroup.com/examples/pxToEm/	 	
 *							
 * Options:  	 								
 		scope: string or jQuery selector for font-size scoping
 		reverse: Boolean, true reverses the conversion to em-px
 * Dependencies: jQuery library						  
 * Usage Example: myPixelValue.pxToEm(); or myPixelValue.pxToEm({'scope':'#navigation', reverse: true});
 *
 * Version: 2.0, 08.01.2008 
 * Changelog:
 *		08.02.2007 initial Version 1.0
 *		08.01.2008 - fixed font-size calculation for IE
--------------------------------------------------------------------*/

Number.prototype.pxToEm = String.prototype.pxToEm = function(settings){
	//set defaults
	settings = jQuery.extend({
		scope: 'body',
		reverse: false
	}, settings);
	
	var pxVal = (this == '') ? 0 : parseFloat(this);
	var scopeVal;
	var getWindowWidth = function(){
		var de = document.documentElement;
		return self.innerWidth || (de && de.clientWidth) || document.body.clientWidth;
	};	
	
	/* When a percentage-based font-size is set on the body, IE returns that percent of the window width as the font-size. 
		For example, if the body font-size is 62.5% and the window width is 1000px, IE will return 625px as the font-size. 	
		When this happens, we calculate the correct body font-size (%) and multiply it by 16 (the standard browser font size) 
		to get an accurate em value. */
				
	if (settings.scope == 'body' && $.browser.msie && (parseFloat($('body').css('font-size')) / getWindowWidth()).toFixed(1) > 0.0) {
		var calcFontSize = function(){		
			return (parseFloat($('body').css('font-size'))/getWindowWidth()).toFixed(3) * 16;
		};
		scopeVal = calcFontSize();
	}
	else { scopeVal = parseFloat(jQuery(settings.scope).css("font-size")); };
			
	var result = (settings.reverse == true) ? (pxVal * scopeVal).toFixed(2) + 'px' : (pxVal / scopeVal).toFixed(2) + 'em';
	return result;
};