add:  this.events.destroy(); this.events = null; 
context:     destroy:function() {        this.layer  = null;        this.bounds = null;        this.size = null;        this.position = null;    },
meta: 1027	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/1027/921347a81abbd7e6bd7240cfea7c075b0b7cfbdc/Tile.js/clean/lib/OpenLayers/Tile.js