validation

trying to use regexp against form elements like so...

function validate ()
{
var string = 12345;
var isAlpha = /^[a-z ]$/;
if( !isAlpha.document.forms.numbers.value)
alert (document.forms.numbers.value);
}

is this the right approach

thanx
Kevin

been a while since i've worked with RE's, but, i think it should be:

function validate ()
{
var string = 12345;
var isAlpha = /^[a-z ]$/;
if( !isAlpha.test(document.forms.numbers.value))
alert (document.forms.numbers.value);
}

I appreciate the help

thank you
Kevin