reg ex help

I want a regular expression such that it will not allow " and ' in a text.

<script type="text/javascript">

function noquotes() {

re = /[\'\"]/ ;
if (re.test(document.f1.t1.value)) {
document.f1.t1.value = document.f1.t1.value.replace(/[\'\"]/g,"");
}
}

</script>

<form name="f1">
<input type="text" name="t1" onkeyup="noquotes()">
</form>