Calling a function on Button click in elementor

I am new to WordPress and elementor. I have created a form and I have to perform some functions on button click. The functions are like redirecting to different or validating some information. I inserted the HTML code element in the section and created the form. But I am not clear where to write the function and how to call it.

Below is the HTML code

<input type="text" id="IMEI" name="IMEI" placeholder="Enter your IMEI here" class="textbox">
<input type="button" class="buttonchk" value="Check Phone">
<br>
<br>

Can someone please help