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I have created a table inside a form and one column consists of input elements. I have written a JavaScript function to validate each input. If invalid, the corresponding error message should be displayed beside respective input. In my case, for any input, the error message is always displayed beside the first input.

I tried using <div> and <span> tags with respective id values. For every invalid input the error message is displayed beside the first input and not the corresponding input.

Html table

<table>
    <tr>
        <td>S.No</td>
        <td>Particulars</td>
        <td>Amount</td>
        <td></td>
    </tr>

    <tr>
        <td>01</td>
        <td>Annual Rent (Only of residential unit not owned by employer)</td>
        <td><input type="number" name="ann_rent"><div id="ar_invalid"></div></td>
    </tr>

    <tr>
        <td>02</td>
        <td>Mediclaim (U/s. 80D of I.T. Act)</td>
        <td><input type="number" name="medi"><div id="medi_invalid"></div></td>
    </tr>

    <tr>
         <td>03</td>
         <td>Interest paid for Home Loan</td>
         <td><input type="number" name="home_int"><div id="home_invalid"></div></td>                        
    </tr>


     <tr>
          <td>04</td>
          <td>National Pension</td>
          <td><input type="number" name="nat_pen"><div id="pen_invalid"></div></td>                   
     </tr>
</table>

Javascript function

function validate() {
var a,b,c,d;
a = document.getElementsByName("ann_rent")[0].value;
b = document.getElementsByName("medi")[0].value;
c = document.getElementsByName("home_int")[0].value;
d = document.getElementsByName("nat_pen")[0].value;
if(!a || a < 0) {
    document.getElementById("ar_invalid").innerHTML = text;          
    return false;
}

if(!b || b < 0) {
    document.getElementById("medi_invalid").innerHTML = text;
    return false;
}

if(!c || c < 0) {
    document.getElementById("home_invalid").innerHTML = text;
    return false;
}

if(!d || d < 0) {
    document.getElementById("pen_invalid").innerHTML = text;
    return false;
}
}

Table is inside this form

<form action="process_form.php" method="post" onSubmit="return validate();">

CSS

td, th {
    text-align: left;
    padding: 8px;
}

table {
    margin-top: 30px;
    margin-bottom: 10px;
    font-family: arial, sans-serif;
    width: 100%;
}

If user enters a negative value in input name="home_int", then the error message should be displayed beside input home_int. But actually, the error message is getting displayed beside input name="ann_rent". This situation is occurring for every input.


use th for headers. Add a new td for the error message

    <table>
            <tr>
                <th>S.No</th>
                <th>Particulars</th>
                <th>Amount</th>
                <th></th>
            </tr>

            <tr>
                <td>01</td>
                <td>Annual Rent (Only of residential unit not owned by employer)</td>
                <td><input type="number" name="ann_rent"></td>
                <td><div id="ar_invalid"></div></td>
            </tr>
    </table>

css

table td, table th {
  padding: 20px;
  border-spacing: 10px;
}

table {
  border-collapse: collapse;
}

Javascript validation errors to be displayed after each textbox , Form will consist of two input fields (name and email)… (No need to show an error message) d. When I start <center> <table border="1" > <tr> <td> <form name = "registerationform" method="POST" action="welcome.html"  Using javascript validation is one of the most appealing part in web development where you can display errors messages to users in case a form doesn't contain required field data. Let's add a form first before working on the validation part.


Assuming you have a button to submit for form validation which goes something like this:

    <input type="submit" name="s" value="ds"/>

What happening is when your function gets inside the first if it then returns false and form will not be submitted so the other ifs wont perform any action in this situation so when you type any negative number in the first if, other ifs whether they are positive or negative wont work and the code will execute the message in the first div

but it will work and will show the message in the desired div if you will only put a negative number inside a specific textbox and all before will be positive

How to display error message in html form with javascript form , How to display error message in html form with javascript form validation without using alert? <span id="error-name"></span> <input type="text" name="your-​name" id beside the labels for each form field where we'll display the error message. then, their respective error ids will display the defined texts inside it with the  When the Data Validation dialog box appears, select the Input Message tab. 4. Enter a Title in the Title field box (something that describes what your message is about): User IDs


Change the "errors" divs to similar as below so you can have a simpler javascript code:

HTML:

<form action="/" method="post" onSubmit="return validate();">
<table>
    <tr>
        <td>S.No</td>
        <td>Particulars</td>
        <td>Amount</td>
        <td></td>
    </tr>

    <tr>
        <td>01</td>
        <td>Annual Rent (Only of residential unit not owned by employer)</td>
        <td><input type="number" name="ann_rent"><div id="ann_rent_invalid"></div></td>
    </tr>

    <tr>
        <td>02</td>
        <td>Mediclaim (U/s. 80D of I.T. Act)</td>
        <td><input type="number" name="medi"><div id="medi_invalid"></div></td>
    </tr>

    <tr>
         <td>03</td>
         <td>Interest paid for Home Loan</td>
         <td><input type="number" name="home_int"><div id="home_int_invalid"></div></td>                        
    </tr>


     <tr>
          <td>04</td>
          <td>National Pension</td>
          <td><input type="number" name="nat_pen"><div id="nat_pen_invalid"></div></td>                   
     </tr>
  </table>
  <input type="submit" value="Submit">
</form>

and in javascript:

function validate() {
  var text = "error";
  var required = ["ann_rent", "medi", "home_int", "nat_pen"];
  var errors = 0;

  required.forEach(function(element) {
    var toselect = element + "_invalid";
    var reqV = document.getElementsByName(element)[0].value;
    if(!reqV || reqV < 0) {
      document.getElementById(toselect).innerHTML = text;
      errors++;
    } else {
      document.getElementById(toselect).innerHTML = null; 
    }
  });

  if(errors > 0){
     return false;
  }
}

JavaScript and jQuery by Examples, We set up a table with three columns, which displays the labels, input elements and error messages (if any), respectively. See the screenshot. <td><input type="​  Learn how to create alert messages with CSS. Alerts Alert messages can be used to notify the user about something special: danger, success, information or warning.


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<input>: The Input (Form Input) element, The HTML input element is used to create interactive controls for web-based forms in button, A push button with no default behavior displaying the value of the This table is followed by a list describing each attribute in greater detail, along a device's contacts list to autocomplete email addresses in an email input field. To create that effect actually requires several technologies working in harmony: HTML, Javascript, and CSS. However using something like JQuery, we can do this easily!


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