JS Udalosti

            comment = document.getElementsByName("comment")[0];
            firstName = document.getElementsByName("firstName")[0];
            firstNameWrong = document.getElementById("firstNameWrong");

            firstName.onblur = function () {
                if (firstName.value == "") {
                    firstName.style.border = "1px solid red";
                    firstNameWrong.style.display = "block";
                } else {
                    firstName.style.border = "1px solid green";
                    firstNameWrong.style.display = "none";
                }
            };

            comment.onfocus = function () {
                if (comment.value == "Place for comment...") {
                    comment.value = "";
                }
            };

            comment.onblur = function () {
                if (comment.value == "") {
                    comment.value = "Place for comment...";
                }
            };