var pos=0; 
 var lg=50;
 var vitesse=100;
 var init=0;
 var text="";
 var space="";
 var gad;
 

   document.write('<form name="fscroll_cyb"><input type="text" size="100" name="scroll_cyb_me">');
   document.write('<input type="button" value="-" onClick="if ( vitesse + 20 < 300 ) {vitesse += 20; window.defaultStatus= vitesse;}">');
   document.write('<input type="button" value="+" onClick="if ( vitesse - 20 > 0 ) {vitesse -= 20; window.defaultStatus = vitesse;}"></form>');
 
   if ( document.all ) lg = 130;
   for (i=0; i<lg; i++, space += " " ) {};
   text = space + textkeco;
   gad=document.fscroll_cyb.scroll_cyb_me;
     
   setTimeout( 'scroll( )', vitesse );
 

 function scroll()
 {
   pos ++;
   gad.value = text.substr( pos, lg);
   setTimeout( 'scroll( )', vitesse );
   if ( pos >  text.length) pos = 0;
 }