add: this.imgDiv.map = null; 
context:     destroy: function() {        if ((this.imgDiv != null) && (this.imgDiv.parentNode == this.layer.div)) {            this.layer.div.removeChild(this.imgDiv);        }        this.imgDiv = null;        OpenLayers.Tile.prototype.destroy.apply(this, arguments);    },
meta: 1027	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/1027/3309b0b12e86ee49e68b042909549851d1da8247/Image.js/clean/lib/OpenLayers/Tile/Image.js