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function checkFile(testfile) {
try {
netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
} catch (e) {
//alert("Permission to read file was denied.");
}
var file = Components.classes["@mozilla.org/file/local;1"]
.createInstance(Components.interfaces.nsILocalFile);
if (!testfile) return;
file.initWithPath(testfile);
if (file.exists() && file.isDirectory()) return true;
else return false;
}
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更多详细接口可以参考:
http://developer.mozilla.org/en/docs/nsILocalFile
另外还有个写文件的例子:
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