if (typeof Ext == "undefined") {
	var Ext = {
		namespace: function() {
			var a=arguments,o=null,i,j,d,rt;
			for(i=0;i<a.length;++i) {
				d=a[i].split(".");
				rt=d[0];
				eval("if (typeof "+rt+" == \"undefined\"){"+rt+" = {};} o = "+rt+";");
				for(j=1;j<d.length;++j){
					o[d[j]]=o[d[j]]||{};o=o[d[j]];
				}
			}
		}
	}
}