回车触发事件

//--form 表单，如果指针在input中，回车会自动触发提交       

document.onkeydown = function(e){

            var ev = document.all ? window.event : e;
            if(ev.keyCode==13){
                gosign();
            }
        };

        //报名成功;

        $('.submit').on('click',gosign = function () {           //---gosign 格式

            var signname = $('#signname').val();
            if(!signname || (signname.length == 0)){
                alert("请输入姓名");
                $('#signname').focus();
                return false;
            }
            var signtel = $('#signtel').val();
            if(!signtel || (signtel.length == 0)){
                alert("请输入联系电话");
                $('#signtel').focus();
                return false;

            }

}