rem: return prefix + Math.round(Math.random() * 10000); 
add: OpenLayers.Util.lastSeqID += 1; return prefix + OpenLayers.Util.lastSeqID; 
context: OpenLayers.Util.createUniqueID = function(prefix) {    if (prefix == null) {        prefix = "id_";    }    return prefix + Math.round(Math.random() * 10000);        };
meta: 1027	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/1027/dbdf9a3df8605687682bf200ae719711f898918d/Util.js/clean/lib/OpenLayers/Util.js