jQuery(document).ready(function(){
       jQuery.fn.fadeToggle = function(speed, easing, callback) {
          return this.animate({opacity: 'toggle'}, speed, easing, callback);
       };

	jQuery(".linzhover").hover(function(evt) {
	    this.src = this.src.replace("_off","_on");
	},
	function(evt) {
	    this.src = this.src.replace("_on","_off");
	});
});