JSFiddle - React, Tailwind, and code Playground

HTML

<form name="form1" action="login_check.jsp">
    <input type="text" name="email_id" value="1">
    <input type="text" name="password" value="2">
    <input type="text" name="utype" value="3">
    <br>
    <input type="submit" id="button" value="submit">
</form>

JavaScript

$(document).ready(function(){
    $("#button").click(function() { 
        var url = "login_check.jsp?" + $('form').serialize();
        $('form').prop('action', url);  
        alert(document.form1.action); 
        return false;
    });
});