change form element before submit with javascript -


in below code able alert message display correctly displaying message , number "3". know how use passes variable/number declare form element named "priority" passed form before submitting?

my goal use $_post["priority"] , generate number 1, 2, or 3 based on link/button clicked.

 <script language="javascript">     function submitform(priority)     {       alert("changing priority " + priority);       document.frm.submit();     }  </script>  <a href="javascript: submitform('3');" class="ddm"><span class="label">low</span></a> <a href="javascript: submitform('2');" class="ddm"><span class="label">medium</span></a> <a href="javascript: submitform('1');" class="ddm"><span class="label">high</span></a>

add hidden field in form:

<input id='priority' name='priority' type='hidden'/>

before last form submit call, add this:

document.getelementbyid('priority').value = priority;

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