php / JS / DOM question

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I know that this is more of a Javascript / DOM question but I cannot for the life of me figure this out:

I have this form:

<form name="query_form">
<input type="text" name="q"></input>
<input type="button" onclick="drawImg('A',document.forms ['query_form'].elements['q']);" value="Search"></input>
</form>

When the user clicks on the button, I want the text that is in input elment 'q' to be sent to the Javascript function drawImg but when I debug it via alerts, it appears to be NULL. Looking at the examples online, I feel like this should work. Does anybody know why this might not be working correctly?

-jonathan

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