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POJavascript and HTML form validation checks
 

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  1. POJavascript and HTML form validation checks
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    <p>i am trying to learn html and javascript. I have created an html form and am using javascript to validate the fields. I have a isNaN check for the age field, a regex check for emial and a presence check for all fields. I am currently outputting the form to the address bar but this does not work as i am getting errors.</p> <pre><code>&lt;title&gt; &lt;/title&gt; &lt;script type="text/javascript"&gt; function validate() { var errors = 0; if (isNumeric(document.getElementById("age").value) == false) { errors++; } if (emailCheck(document.getElementById("email").value) == false) { errors++; } var inputBoxes = document.getElementsByTagName('input'); for(var i= 0; i &lt; inputBoxes.length; i++) { if(inputBoxes[i].type != 'text') continue; if(presenceCheck(inputBoxes[i].value) == false) { errors++; } } console.log(errors); if(errors == 0) { window.location.assign("output.html#" + "%%" + "name" + "%%" + document.getElementById("name").value + "%%" + "email" + "%%" + document.getElementById("email").value + "%%" + "age" + "%%" + document.getElementById("age").value + "%%" + "comments" + "%%" + document.getElementById("comments").value); } } function isNumeric(number) { return !isNaN(number) &amp;&amp; number != null &amp;&amp; number != ""; } function emailCheck(email) { var emailRegex = /\s+@\s+.\s+/; return emailRegex.test(email); } function presenceCheck(data) { var regex = /\s+/; return regex.test(data); } &lt;/script&gt; </code></pre> <p>Below is the form which is just incased in body tags at the moment</p> <pre><code>&lt;form id="frmA" name="frmA"&gt; &lt;label name="frmName"&gt;Name:&lt;/label&gt;&lt;br /&gt; &lt;input form="frmA" type="text" name="frmName" id="name"/&gt;&lt;br /&gt; &lt;label name="frmEmail"&gt;E-Mail:&lt;/label&gt;&lt;br /&gt; &lt;input form="frmA" type="text" name="frmEmail" id="email"/&gt;&lt;br /&gt; &lt;label name="age"&gt;Age:&lt;/label&gt;&lt;br /&gt; &lt;input form="frmA" name="frmAge" id="age"/&gt;&lt;br /&gt; &lt;label name="frmComments"&gt;Comments:&lt;/label&gt;&lt;br /&gt; &lt;textarea form="frmA" cols="50" rows="10" id="comments"&gt;&lt;/textarea&gt;&lt;br /&gt; &lt;/form&gt; &lt;button onClick="validate();"&gt;Submit&lt;/button&gt; </code></pre> <p>i know that the checks work when no data is present however when i input data in the form and hit submit i am still faced with 4 errors. (there are 5 errors with no data: 3x presence checks, 1 for the regex and one for the isNaN)</p> <p>My question therefore is why am i still getting errors and why do i get no output.</p> <p>Any help would be greatly appreciated. </p> <p>Extra: i would also like the input fields to change colour when there is an error.</p>
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    1. COMay I recommend, if its possible depending on your supported browsers, that you use HTML5s built in validation checks, such as : `<input type="email"../>` etc
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      1. USandy mccullough
    2. COSorry, but what is the question here?
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      1. USfreefaller
    3. COSorry that i wasnt clear, the question is why am i still getting errors and why do i not get any output. I have updated the main post with this too.
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