function LoadLink_2()
{
document.write("<div class='link_box'><select onChange=Link_Open(this.options[this.selectedIndex].value,'1')><option value=''>====专利站友情链接====</option><option value='#'>国家知识产权局</option></select></div>");
}

LoadLink_2();
function Link_Open(link,Target)
 {
   if(link!="")
    {
     if(Target=="1")
      {
       window.open(link,"_target");
      }
     else
      {
       location.href=link;
      }
    }
 }