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POChange button class when form inputs are valid
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  1. POChange button class when form inputs are valid
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    copied!<p>I have a button that submits a form. </p> <pre><code>&lt;input type="button" class="disabled" id="submitbutton" name="Continue" title="Continue" value="Continue" onclick="NextPage('CON');" /&gt; </code></pre> <p>I would like to change the class of the button automatically from "disabled" to "enabled" based on the value of inputs in my form (of which there are quite a few combinations i.e. I can't just list them all as needing a value - there are conditions to whether an input is mandatory). </p> <p>I'd like to do this in JavaScript/Ajax/JQuery so the button class change occurs as soon as all required inputs are valid, rather than some sort of refresh happening to do server side validation. </p> <p>I'm not really sure where to start:</p> <p>I had something along the lines of </p> <pre><code>function ChangeButton() { if (document.forms[0].QUESTIONID.value != "") &amp;&amp; (document.forms[0].QUESTIONIDTWO.value != "") etc etc.... { document.getElementById('submitbutton').class = 'enabled'; } } </code></pre> <p>But I couldn't get it to work - it was only working for the first value - I put an onchange="ChangeButton()" on the dropdown to validate. </p> <p>If someone could give me some tips I'd be extremely grateful! </p> <p>Thank you for the help so far - the parenthesis seems to be where I'm failing:</p> <pre><code> function ChangeButton() { if ((document.forms[0].IPR_TITL.value != "") &amp;&amp; (document.forms[0].IPR_FNM1.value != "") &amp;&amp; (document.forms[0].IPR_FNM1.value != "") &amp;&amp; (document.forms[0].IPR_SURN.value != "") &amp;&amp; (document.forms[0].IPR_GEND.value != "") &amp;&amp; (document.forms[0].IPR_DOB.value != "") &amp;&amp; (document.forms[0].IPQ_CRIM.value != "") &amp;&amp; (document.forms[0].IPQ_ETHC.value != "") &amp;&amp; (document.forms[0].IPQ_DSBC.value != "") &amp;&amp; (document.forms[0].IPQ_MARK1.value != "") &amp;&amp; (document.forms[0].IPQ_NATC.value != "") &amp;&amp; (document.forms[0].IPQ_COBC.value != "") &amp;&amp; (document.forms[0].IPQ_COD.value != "") &amp;&amp; (document.forms[0].IPQ_FIVE.value != "") &amp;&amp; (document.forms[0].IPQ_PERM.value != "") &amp;&amp; (document.forms[0].IPQ_VISF.value != "") &amp;&amp; (document.forms[0].IPQ_A_USD.value != "") &amp;&amp; (document.forms[0].IPR_HAD1.value != "") &amp;&amp; (document.forms[0].IPR_HAD3.value != "") &amp;&amp; (document.forms[0].IPR_HTEL.value != "") &amp;&amp; (document.forms[0].IPR_HAEM.value != "") &amp;&amp; (document.forms[0].IPQ_FEES.value != "") &amp;&amp; (document.forms[0].IPQ_REF1TIT.value != "") &amp;&amp; (document.forms[0].IPQ_REF1ORG.value != "") &amp;&amp; (document.forms[0].IPQ_REF1POS.value != "") &amp;&amp; (document.forms[0].IPQ_REF1AL1.value != "") &amp;&amp; (document.forms[0].IPQ_REF1AL3.value != "") &amp;&amp; (document.forms[0].IPQ_REF1AL5.value != "") &amp;&amp; (document.forms[0].IPQ_REF1EMA.value != "") &amp;&amp; (document.forms[0].IPQ_DISC.value != "")) &amp;&amp; ((document.forms[0].IPQ_PERM.value != "") &amp;&amp; (document.forms[0].IPQ_FIVE.value != "N")) &amp;&amp; ((document.forms[0].IPQ_AGNT.value != "") &amp;&amp; (document.forms[0].IPQ_A_USD.value != "Y")) &amp;&amp; ((document.forms[0].IPQ_CSTRT.value != "") &amp;&amp; (document.forms[0].IPQ_A_USD.value != "N") &amp;&amp; (document.forms[0].IPQ_CENDD.value != "") &amp;&amp; (document.forms[0].IPQ_CAD1.value != "") &amp;&amp; (document.forms[0].IPQ_CAD3.value != "") &amp;&amp; (document.forms[0].IPQ_CAD4.value != "") &amp;&amp; (document.forms[0].IPQ_CAPC.value != "") &amp;&amp; (document.forms[0].IPQ_CTEL.value != "")) &amp;&amp; ((document.forms[0].IPQ_AWDB.value != "") &amp;&amp; (document.forms[0].IPQ_FEES.value != "") &amp;&amp; (document.forms[0].IPQ_FEES.value != "Private Funds Self or Family") &amp;&amp; (document.forms[0].IPQ_AWDS.value != "")) &amp;&amp; ((document.forms[0].IPQ_RESEARCH.value = "Y") &amp;&amp; (document.forms[0].IPQ_RESSRT.value != "") &amp;&amp; (document.forms[0].IPQ_RESMOA.value != "") &amp;&amp; (document.forms[0].IPQ_RESAR.value != "") &amp;&amp; (document.forms[0].IPQ_RESDIS.value != "")) { document.getElementById('submitbutton').className = 'processbuttons'; } else { document.getElementById('submitbutton').className = 'enabled'; } } </code></pre> <p>I've tried various combinations to try and get this working but can't seem to enclose the conditions correctly with the right combination of parenthesis.</p> <p>Again if someone can point me in the right direction I'd be very grateful! </p>
 

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