var d = document;




function mmwidth(){  
      var nav = navigator.appName;                  
    if((nav!="Netscape")&&(nav!="Opera")) 
    {
       ScreenW = d.body.clientWidth;
       ScreenH = d.body.clientHeight;          
       if(ScreenW>1261)       
           document.getElementById('center').style.width='1261px';       
       else              
           document.getElementById('center').style.width='100%';        
    }    
 }

 window.onnload = mmwidth;   
 window.onresize= mmwidth;