rem: layers[t].isPng = function(){return true;}; 
add: layers[n].isPng = function(){return true;}; 
context: 					layers[t].isPng = function(){return true;};
meta: 1713	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/1713/3e489fb47a189e7f3f7fb7943b1822ce301f2200/BitMap.js/clean/templates/BitMap.js