var timeout2=6000;  //切换时间
						var timeout3=10000; //mouse over 后切换时间
						var now_content2=0;
						var total_content2=4;
						var way=1;
						var start_content=Math.round(Math.random()*(total_content2-1))+1; //除广告为第一显示外
						function content_mouse2(num){
						  now_content2=num;
						  window.clearInterval(theTimer2);   
						  for (var i=1;i<=total_content2;i++){
						  document.getElementById("divh11"+i).style.display='none';
						  }
						  document.getElementById("divh11"+num).style.display='block';
						  theTimer2=setTimeout('change_content2()', timeout3);
						}
						
						function change_content2(){
							
						  for (var i=1;i<=total_content2;i++){
						  document.getElementById("divh11"+i).style.display='none';
						  }
						  document.getElementById("divh11"+now_content2).style.display='block';
						  if (way) now_content2++;
						  else now_content2--;
						  if(now_content2>total_content2) {now_content2=total_content2-1;way=0;}
						  else if(now_content2==0) {now_content2=1;way=1;}
						  theTimer2=setTimeout('change_content2()', timeout2);
						}
						theTimer2=setTimeout(function(){now_content2=1;change_content2();}, timeout2);