jQuery.fn.btnOnOff = function() {
		var imgsrc = $(this).attr("src");
		if (imgsrc.indexOf("Off") > 0) {
			$(this).attr("src", imgsrc.replace(/Off/,"On"));
			$(this).attr("alt", "open");
		} else if (imgsrc.indexOf("On") > 0) {
			$(this).attr("src", imgsrc.replace(/On/,"Off"));
			$(this).attr("alt", "close");
		}
		return this;
};