I have very little javascript knowledge so would appreaciate some help onthis please.

I have the following code on my form test.

Code:
		  if (formx.description.value == "") {
        	alert("Please enter a description of what you are contacting David Brown about.");
			formx.description.focus()
        	return false;
        }
But I also want to be able to test to see if the message field contains the following

<a href=
</a>

If it does I would like an error message that comes up saying you can't include links. Is this possible?