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copied!<p>It has to do with your browser's popup blocker. If you look closely at the error, it's describing the submit "button" as the problem, not the mapValue.input line.</p> <p>The below code is working for me:</p> <p><a href="http://jsfiddle.net/WDFNL/" rel="noreferrer">http://jsfiddle.net/WDFNL/</a></p> <pre><code>function openMapWindow (data) { alert(data); var mapForm = document.createElement("form"); mapForm.target = "Map"; mapForm.method = "POST"; // or "post" if appropriate mapForm.action = "/map.php"; var mapInput = document.createElement("input"); mapInput.type = "text"; mapInput.name = "addrs"; mapInput.value = data; mapForm.appendChild(mapInput); document.body.appendChild(mapForm); window.open("", "Map", "status=0,title=0,height=600,width=800"); mapForm.submit(); } openMapWindow('-35.308401,149.124298-35.307841,149.124298'); </code></pre> <p>I did get the error you're describing at first, but it had to do with my popup blocker. Once I authorized jsfiddle.net to be allowed popups, it started working.</p> <p><strong>EDIT</strong></p> <p>There is an easy way to test for this and alert the user if their popup blocker is disabling the map:</p> <p><a href="http://jsfiddle.net/WDFNL/1/" rel="noreferrer">http://jsfiddle.net/WDFNL/1/</a></p> <pre><code>function openMapWindow (data) { var mapForm = document.createElement("form"); mapForm.target = "Map"; mapForm.method = "POST"; // or "post" if appropriate mapForm.action = "/map.php"; var mapInput = document.createElement("input"); mapInput.type = "text"; mapInput.name = "addrs"; mapInput.value = data; mapForm.appendChild(mapInput); document.body.appendChild(mapForm); map = window.open("", "Map", "status=0,title=0,height=600,width=800"); if (map) { mapForm.submit(); } else { alert('You must allow popups for this map to work.'); } } openMapWindow('-35.308401,149.124298-35.307841,149.124298'); </code></pre> <p>Note the <code>map</code> variable. You can test it to see if <code>window.open</code> returned a window handle, and act accordingly depending on the result.</p>

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