JS读取本地文件(兼容IE和Firefox)
<script type="text/javascript">
function read(file) {
if(typeof window.ActiveXObject != 'undefined') {
var content = "";
try {
var fso = new ActiveXObject("Scripting.FileSystemObject"); 
var reader = fso.openTextFile(file, 1);
while(!reader.AtEndofStream) {
content += reader.readline();
content += "\n";
}
// close the reader
reader.close();
}
catch (e) {
alert("Internet Explore read local file error: \n" + e);
}

return content;
}
    else if(document.implementation && document.implementation.createDocument) {
var content = ""
try {
netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
var lf = Components.classes["@mozilla.org/file/local;1"].createInstance(Components.interfaces.nsILocalFile);
lf.initWithPath(file);
if (lf.exists() == false) { 
                alert("File does not exist"); 
            }

            var fis = Components.classes["@mozilla.org/network/file-input-stream;1"].createInstance(Components.interfaces.nsIFileInputStream); 
            fis.init(lf, 0x01, 00004, null); 
            var sis = Components.classes["@mozilla.org/scriptableinputstream;1"].createInstance(Components.interfaces.nsIScriptableInputStream); 
            sis.init(fis); 
            var converter = Components.classes["@mozilla.org/intl/scriptableunicodeconverter"].createInstance(Components.interfaces.nsIScriptableUnicodeConverter); 
            converter.charset = "UTF-8"; 
            content = converter.ConvertToUnicode(sis.read(sis.available()));
}
catch (e) {
alert("Mozilla Firefox read local file error: \n" + e);
}

return content;
}
}
</script>