this href open new window not work in ie7 ? in chrome , firefox and other browser are good, but ie 7 not work , how can i do ?

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```
<a href="javascript:window.open('rated.php','Rated','width=618,height=265')">
    Rated
</a>

```

in chrome , firefox and other browser are good, but ie 7 not work , how can i do ?