disable submit button after form validation
<form action="#" method="post" id="myform" name="myform">
Location: <input name="location" type="text" />
Site: <input name="site" type="text" />
Age: <input name="age" type="text" />
Gender <input name="gender" type="text" />
<input name="button" type="submit" class="myButton" id="button" value="Submit" />
</form>