rem: this.layer.div.removeChild(this.img); 
add: if (this.img.parentNode == this.layer.div) { this.layer.div.removeChild(this.img); } 
context:     destroy: function() {        this.layer.div.removeChild(this.img);        this.img = null;    },
meta: 1027	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1027/a4d0badaeb2a754163d24412a77855f019aa5bb1/Image.js/clean/lib/OpenLayers/Tile/Image.js