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Editorial Team
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Asked: 2026-05-13T13:21:21+00:00

I just started PHP. I created a form in which there are three textboxes

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I just started PHP. I created a form in which there are three textboxes (name,email,age). Now suppose I fill deepak in textbox1 and then I press tab to go on next textbox but I keep it empty and then I press again tab and g in last textbox. As I move to third textbox, on the right side of textbox2 a error message should be displayed (plz fill email box). How I can do this? I know for this ajax will be used because I am not refreshing the page. Please give an example. Because once I get it I can apply this for all boxes…

                          Thanking You in Advance...
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1 Answer

  1. Editorial Team

    On the focus of the age input, you can text for the presence of text in the email field using jQuery.

    Providied you have the following HTML

    <input type="text" id="email" />
<p id="email-error-label"></p>
<input type="age" id="email" />

    You can use the following JavaScript:

    $('#age').focus(function (){
  email = $('#email').val();
  if(email.length() == 0)
  {
    $('#email-error-label').val('Please fill in email');
  }  
});

    NB: I have not tested this code

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