document.write1 = function (s)  

{  

document.getElementById('r1').innerHTML+=s;  

 return false;  

 } 



  document.write1("<a href='http://www.laserfocusworld.com.cn/counter_ad-click1.asp?ad_id=270&schedule_id=292' target='_blank'><img border= 0  src='https://www.laserfocusworld.com.cn/upload/images/2025/11/2025-11-19-10-43-25.jpg'  width=\"300\"  align='top' alt='2026 慕尼黑上海光博会' title='2026 慕尼黑上海光博会' ></a>");