JavaScript高级程序设计笔记

        window.onload = function(){
            var form =  document.getElementById("form1");
            var colorFields = form.elements["color"];
            alert(colorFields.length);

            var firstField = colorFields[0];
            var firstFormField = form.elements[0];

            alert(firstField === firstFormField); // false ，书上是true
        }