javascript question

Question

if(/^[a-z]{6,}$/i.test(string)) alert("true")

Answer 1

<script language="JavaScript">
function check(val)
{
var pattern = new RegExp('^[a-zA-Z]{6,}$');
if (pattern.test(val))
alert("匹配")
else
alert("不匹配")
}
</script>
<input type="text" id="txt" value="">
<input type="button" value="check" name="btn" onclick="check(txt.value)">