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copied!<p>Since you're not passing any parameters into your <code>get_qpe()</code> function, those variables are being returned as <code>undefined</code>. Try this:</p> <p>Change your button to the following:</p> <pre><code><input type="submit" value="Get QPE Map" id="submit"> </code></pre> <p>And then add the following JavaScript:</p> <pre><code>function listen(event, elem, func) { if (elem.addEventListener) elem.addEventListener(event, func, false); else if (elem.attachEvent) { var r = elem.attachEvent("on" + event, func); return r; } } listen('load', window, function() { var form = document.getElementById('SelectURL6'), btn = document.getElementById('submit'); function get_qpe(elems) { var url = '', o = {}, val = 0, names = [], thisElem; for (var i = 0; i < elems.length; i += 1) { thisElem = elems[i]; names.push(thisElem.getAttribute('name')); val = thisElem.options[thisElem.selectedIndex].value; o[names[i]] = parseInt(val); } o.TE = o.TE + 7; if (o.ME === 12 && o.DE === 31 && o.TE > 24) { o.YE = o.YE + 1; o.ME = 1; o.DE = 1; o.TE = o.TE - 24; } else if (o.DE === 31 && o.TE > 24) { o.ME = o.ME + 1; o.DE = 1; o.TE = o.TE - 24; } else if (o.DE === 30 && o.ME === 4 && o.TE === 24) { o.ME = o.ME + 1; o.DE = 1; o.TE = o.TE - 24; } else if (o.DE === 30 && o.ME === 6 && o.TE === 24) { o.ME = o.ME + 1; o.DE = 1; o.TE = o.TE - 24; } else if (o.DE === 30 && o.ME === 9 && o.TE === 24) { o.ME = o.ME + 1; o.DE = 1; o.TE = o.TE - 24; } else if (o.DE === 30 && o.ME === 12 && o.TE === 24) { o.ME = o.ME + 1; o.DE = 1; o.TE = o.TE - 24; } else if (o.TE > 24) { o.TE = o.TE - 24; o.DE = o.DE + 1; } url = "http://nmq.ou.edu/cgi-bin/tools_QPE.cgi?1+0+2+" + o.YE + "+" + o.ME + "+" + o.DE + "+" + o.TE + "+0+0+34.50+-114.00+32.50+800+632+4101+0+0+1+0+Q2RAD_HSR+Q2RAD_HSR_GC+" + o.TS + "+english+none+CNTY"; window.open(url); } listen('click', btn, function() { var selectElems = form.getElementsByTagName('select'), i = 0; get_qpe(selectElems); }); }); </code></pre> <p>Here is a <a href="http://jsfiddle.net/9dM4Q/7/" rel="nofollow">jsFiddle</a> that you can reference.</p>

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