park.ImgChange = Class.create();
park.ImgChange.prototype = {
		initialize: function(options){
			this.options = {
						imgOpen: '/img/new-openComment.gif',
						imgClose: '/img/new-closeComment.gif'
					}.extend(options || {});
		}
}		


park.open_close =  function(){
			if(typeof this.obj.style.display == "undefined" || this.obj.style.display =="" || this.obj.style.display == 'none'){
				this.obj.style.display = 'block';
				this.obj.style.visibility = 'visible';
				this.src = this.imgOptions.options['imgClose'];
			} else {
				this.obj.style.display = 'none';
				this.obj.style.visibility = 'hidden';
				this.src = this.imgOptions.options['imgOpen'];
			}
}