--- a/lib/common.inc.php
+++ b/lib/common.inc.php
@@ -82,6 +82,59 @@
 		</style> 
 		<script type="text/javascript" language="javascript" src="media/js/jquery.dataTables.js"></script> 
 		<script type="text/javascript" charset="utf-8"> 
+jQuery.fn.dataTableExt.aTypes.unshift(  
+    function ( sData )  
+    {  
+        var sValidChars = "0123456789.-,";  
+        var Char;  
+          
+        /* Check the numeric part */  
+        for ( i=1 ; i<sData.length ; i++ )   
+        {   
+            Char = sData.charAt(i);   
+            if (sValidChars.indexOf(Char) == -1)   
+            {  
+                return null;  
+            }  
+        }  
+          
+        /* Check prefixed by currency */  
+        if ( sData.charAt(0) == '$' || sData.charAt(0) == '£' )  
+        {  
+            return 'currency';  
+        }  
+        return null;  
+    }  
+);
+jQuery.fn.dataTableExt.oSort['currency-asc'] = function(a,b) {
+	/* Remove any commas (assumes that if present all strings will have a fixed number of d.p) */
+	var x = a == "-" ? 0 : a.replace( /,/g, "" );
+	var y = b == "-" ? 0 : b.replace( /,/g, "" );
+	
+	/* Remove the currency sign */
+	x = x.substring( 1 );
+	y = y.substring( 1 );
+	
+	/* Parse and return */
+	x = parseFloat( x );
+	y = parseFloat( y );
+	return x - y;
+};
+
+jQuery.fn.dataTableExt.oSort['currency-desc'] = function(a,b) {
+	/* Remove any commas (assumes that if present all strings will have a fixed number of d.p) */
+	var x = a == "-" ? 0 : a.replace( /,/g, "" );
+	var y = b == "-" ? 0 : b.replace( /,/g, "" );
+	
+	/* Remove the currency sign */
+	x = x.substring( 1 );
+	y = y.substring( 1 );
+	
+	/* Parse and return */
+	x = parseFloat( x );
+	y = parseFloat( y );
+	return y - x;
+};
 			$(document).ready(function() {
 				$('table').dataTable();
 			} );