javascript - I am trying to display a div on click of a checkbox -


i need display image , info item when checkbox clicked. reason nothing happening , have been tweaking while no response whatsoever. here javascript: 

<script type = "text/javascript">     function displayonchecked(var checkboxid, var id) {         if(document.getelementbyid(checkboxid)) {             document.getelementbyid(id).style.display = "block";         } else {             document.getelementbyid(id).style.display = "none";         }     } </script>

in stylesheet have on display: none;

here 1 of invocations:

<input type="checkbox" name="purchaseditem" id = "item" onclick="displayonchecked('item', 'iteminfo');">

no need var keyword in arguments list of displayonchecked, have variable names alone.

if in console, should getting error: uncaught syntaxerror: unexpected token var


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