form表单的JS交互

读取表单的值

function showFormValue(){
            var form = document.forms["myform"];
            alert(form.name.value);
            alert(form.xb.value);
        //debugger;断点检查
            var arr = form.ah;
            var sel = [];
            for(var i=0;i

给按钮注册一个事件

window.onload = function(){
            //获取按钮对象
            var subBtn = document.getElementById("subBtn");
            subBtn.onclick = showFormValue;
            
            setFormValue();
}