So pickRoadid is being called. Use firebug or similar debugger to set a breakpoint at var val = .... and examine what you are actually getting in features. More likely however the problem is with the DOM. Whatever beast is identified by 'fid' may not have a data value. Evaluate document.getElementById('fid') and see whether it is what you expect.function pickRoadid(event) { popupClear(); if (event.features && event.features.length) { alert("hi"); var val = event.features[0].attributes.id; document.getElementById('fid').value = val; } }But its returning me an error Cannot set property 'value' of null .
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