function Browser()
        {  	
           if (navigator.appVersion.indexOf("(X11") != -1 || navigator.appVersion.indexOf("(Mac") != -1) return 1
                else return 0
        }

   function Description(url,dow,winwidth,winheight)
	     {
            if (stat == 0)
                     {
                       description=window.open(url,'descr','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbar=no,scrollbars=0,resizable=no,copyhistory=no,width='+winwidth+',height='+winheight)
                       description.focus()
                       stat=dow
                       if (Browser() == 1 ) window.open(url,'descr')
                        }
                else
                        {
                        description.close()
                        if (stat != dow)
                                { 
                                stat=dow
                                description=window.open(url,'descr','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbar=no,scrollbars=no,resizable=no,copyhistory=no,width='+winwidth+',height='+winheight)
                                description.focus()
                                if (Browser() == 1 ) window.open(url,'descr')
                                }
                        else
                                {
                                stat=0
                                }
                        }
		
       }