直接實例化類并調用類方法即可使用：
public class MyClass
{
  public MyClass()
  {
  }
  public void Aert(string message)
  {
  string str;
  str="<script language='javascript'>{";
  str+="alert('"+message+"');";
  str+="}</script>";
  System.Web.HttpContext.Current.Response.Write(str);
  }
  public void OpenWin(string url,string flag)
  {
  string str,clientscript;
  str="window.open('"+url+"?flag="+flag+"',"+"'NewWin',"+"'width=760px,height=500px,left=15px,top=5px,status=yes')";
  clientscript="<script language='javascript'>{";
  clientscript+=str;
  clientscript+="}</script";
            System.Web.HttpContext.Current.Response.Write(clientscript);
    }
}