;( function ($) {
	$.fn.adhelper_is_on_screen = function () {
	    var win = $(window);
	    var viewport = {
	        top : win.scrollTop(),
	        left : win.scrollLeft()
	    };

	    viewport.right = viewport.left + win.width();
	    viewport.bottom = viewport.top + win.height();
	 
	    var bounds = this.offset();
	    bounds.right = bounds.left + this.outerWidth();
	    bounds.bottom = bounds.top + this.outerHeight();
	 
	    return (!(viewport.right < bounds.left || viewport.left > bounds.right || viewport.bottom < bounds.top || viewport.top > bounds.bottom));
	};

	String.prototype.replaceAll = function(search, replacement) {
	    var target = this;
	    return target.replace(new RegExp(search, 'g'), replacement);
	};

	$('body').wrapInner('<div class="ah-page" />');
})(jQuery);