javascript - Using Onchange to Lookup Values -

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i'm trying create javascript file has drop-down list select fruit out of grabbing image of said fruit , displaying price well. i'm getting error on html , don't know doing wrong. script isn't running... edited out beginning script added javascript drop-down list select private link.

html:

<script src='* link of table provides variable urlbase, array imagename, & array containing price'></script> <br> <br> <img id='product image' src='' height='200'> <br> <br> price <span id='price display'></span> <!-- interface objects go here. --> <!-- insert javascript here. --> <script src='js/javascript 10.js'></script>

and here's javascript.... 

document.getelementbyid('productid').onchange = function() {   var productid = this.value;   productid = parseint(productid);   iname = imagename[productid];   url = urlbase + iname;   document.getelementbyid('product image').src = url;   iprice = price[productid];   document.getelementbyid('price display').innerhtml = iprice; };

any ideas? thank help!

this error i'm receiving don't understand well:

debug trace of operations - these operations attempted 1. check load of home page: javascript 10.html 2. in javascript 10.html:     perform: document.getelementbyid("productid").selectedindex=0;     perform: document.getelementbyid("productid").selectedindex=3;     perform: document.getelementbyid('productid').onchange();     check: document.getelementbyid('product image').src;     check: document.getelementbyid('price display').innerhtml;     perform: document.getelementbyid("productid").selectedindex=1;     perform: document.getelementbyid('productid').onchange();     check: document.getelementbyid('product image').src;     check: document.getelementbyid('price display').innerhtml; if not see part 2 grade code has error on javascript 10.html or on next page after javascript 10.html.


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