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var y = "global";
function factory() {
var y = "local";
//return function(){return y;}; //第5行
return (new Function ("return y"))();//第6行
}
alert(factory()); // global
var y = "global";
function factory() {
var y = "local";
return function(){return y;}; //第5行
//return new Function ("return y");//第6行
}
alert(factory()());
var functionName = new Function("argument 1",..."argument n",
"statements for function body");