set seconds_to_delay to 120

tell application "Safari"
    repeat
        repeat with i from 1 to the count of windows
        
            set window_name to name of window i
            
            if window_name is not "" and window_name is not "Allgemein" then
                
                repeat with j from 1 to the count of every tab in window i
                    do JavaScript "window.location.reload()" in (tab j of window i)
                end repeat
                
            end if
            
        end repeat
        delay seconds_to_delay
    end repeat
end tell

javascript:(function(){var%20intv=prompt('%23Secs.%20between%20reloads?','60');if(intv&&!isNaN(intv)){with(document){write('%3Chtml%3E%3Cframeset%20rows=\'*,16\'%20framespacing=0%20border=0%20frameborder=no%3E%3Cframe%20noresize%20frameborder=no%3E%3Cframe%20scrolling=no%20noresize%20frameborder=no%3E%3C/frameset%3E%3C/html%3E');frames[0].location.href=document.location.href;var%20docstr='%3Chtml%3E%3Cbody%20bgcolor=white%20style=\'margin-top:-2px\'%3E\n';docstr+='Reloading%20in%20%3Cspan%20id=\'caption\'%3E%3C/span%3Esecs.%3C/body%3E\n';docstr+='%3Cscript%3E\nvar%20reloadIntv='+intv+';\nvar%20secsLeft='+intv+';\nfunction%20reloadFrame(){secsLeft=reloadIntv+1;parent.frames[0].location.href=parent.frames[0].location.href;}\nfunction%20countDown(){secsLeft--;showTime();}\nfunction%20showTime(){document.getElementById(\'caption\').innerHTML=parseInt(secsLeft)+\'%20\';}\nsetInterval(\'reloadFrame()\','+intv*1000+');\nsetInterval(\'countDown()\',1000);\nshowTime();\n%3C/script%3E\n%3C/html%3E';frames[1].document.write(docstr);}}})()

...(intv)){with(docu ment){write...

...(intv)){with(document){write...