//下面两个函数 判断浏览器是不是原生chrome
function _mime(where, value, name, nameReg) {
var mimeTypes = window.navigator.mimeTypes,
i;
for (i in mimeTypes) {
if (mimeTypes[i][where] == value) {
if (name !== undefined && nameReg.test(mimeTypes[i][name])) return !0;
else if (name === undefined) return !0;
}
}
return !1;
}
function _getChromiumType() {