//自动切换选项卡
<!--
       
var tablink_idname = new Array("tablink")
var tabcontent_idname = new Array("tabcontent") 
var tabcount = new Array("4")
var loadtabs = new Array("1") 
var autochangemenu = 1;
var changespeed = 4;//此处数值为调节速度快慢，速度越大越慢。
var stoponhover = 0;

function easytabs(menunr, active)
{
  if (menunr == autochangemenu){currenttab=active;}
  if((menunr == autochangemenu)&&(stoponhover==1))
  {
    stop_autochange()
  }
  else if((menunr == autochangemenu)&&(stoponhover==0))
 { 
    counter=0;
  }
  menunr = menunr-1;
  for (i=1; i <= tabcount[menunr]; i++)
  {
     document.getElementById(tablink_idname[menunr]+i).className='tab'+i;
     document.getElementById(tabcontent_idname[menunr]+i).style.display = 'none';
   }
   document.getElementById(tablink_idname[menunr]+active).className='tabactive';
   document.getElementById(tabcontent_idname[menunr]+active).style.display = 'block';
}
var timer; counter=0; 
var totaltabs=tabcount[autochangemenu-1];
var currenttab=loadtabs[autochangemenu-1];
function start_autochange()
{
  counter=counter+1;timer=setTimeout("start_autochange()",1000);
  if (counter == changespeed+1) 
   {
    currenttab++;
    if (currenttab>totaltabs) {currenttab=1}
    easytabs(autochangemenu,currenttab);restart_autochange();
   }
}
function restart_autochange()
{
 clearTimeout(timer);counter=0;start_autochange();
}
function stop_autochange()
{
 clearTimeout(timer);counter=0;
}

window.onload=function()
{
  var menucount=loadtabs.length;
  var a = 0; var b = 1; 
  do 
 {
  easytabs(b, loadtabs[a]);
  a++; 
  b++;
 }
 while (b<=menucount);
if (autochangemenu!=0){start_autochange();}
}
//-->
//自动切换选项卡结束