<script>    
    }   function isEmail() {
        var form = window.document.forms[0];
        var all_elements="";
        for (var i = 0; i<form.elements.length; i++) {
            // if (form.elements[i].type == "text") {
            //     form.elements[i].value = ""}
            var elem1 = document.getElementById (form.elements[i]);
            //var defValue1 = elem1.defaultValue;
            all_elements=all_elements+form.elements[i].name+" значение "+";";
        }
        document.getElementById("demo_2").innerHTML =all_elements;
        // document.getElementById("demo_2").innerHTML = document.getElementById("email1").value;
    }
</script>
<div id="demo_2"></div>