//**1.设置选中值:(根据索引确定选中值)**// var osel=document.getElementById("selID"); //得到select的ID var opts=osel.getElementsByTagName("option");//得到数组option var obt=document.getElementById("bt"); obt.onclick=function(){ opts[3].selected=tr
实现如下效果: 实现方式如下: using System;using System.Drawing.Printing;using System.Runtime.InteropServices;using System.Windows.Forms; namespace PISS.View.CustomControl{ public partial class PrinterConfigMessBox : Form { #region 定义.构造.初始化 [DllImport("winspool.d