Here is what I have - shouldnt it stop you from submitting a blank field? (it is at )
<body>
<cfform action="form.cfm" method="post" enablecab="yes">
<cfinput name="tester" type="text" size="10" maxlength="10" required="yes" message="Please enter text">
<input name="submit" type="submit" value="submit">
</cfform>
</body>
<body>
<cfform action="form.cfm" method="post" enablecab="yes">
<cfinput name="tester" type="text" size="10" maxlength="10" required="yes" message="Please enter text">
<input name="submit" type="submit" value="submit">
</cfform>
</body>