rem: this.listeners[type].pop(); 
add: if (this.listeners[type] != null) { this.listeners[type] = new Array(); } 
context:     remove: function(type) {        this.listeners[type].pop();    },
meta: 4411	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/4411/dd426691ee5d177526df42e172dda1d1b59c27eb/Events.js/clean/lib/OpenLayers/Events.js