+
+if ( jQuery.expr && jQuery.expr.filters ) {
+ jQuery.expr.filters.hidden = function( elem ) {
+ var width = elem.offsetWidth, height = elem.offsetHeight,
+ skip = elem.nodeName.toLowerCase() === "tr";
+
+ return width === 0 && height === 0 && !skip ?
+ true :
+ width > 0 && height > 0 && !skip ?
+ false :
+ jQuery.curCSS(elem, "display") === "none";
+ };
+
+ jQuery.expr.filters.visible = function( elem ) {
+ return !jQuery.expr.filters.hidden( elem );
+ };
+}