AIidE/js/register.js

window.addEventListener("load", function () {
    let passwd = this.document.getElementById("passwd");
    let passwd_conf = this.document.getElementById("conf_passwd");
    
    passwd_conf.addEventListener("change", function(){
        this.style.border += "red";
        let error = document.getElementById("error");
        error.style.display = "block";
    });
});