function msubmit() {
   document.sendform.submit();
   return true;
}

function merw_switch() {
   if(document.sendform.erw.value == 0)
      document.sendform.erw.value=1;
   else {
      document.sendform.erw.value=0;
      document.sendform.sutext.value="";
      document.sendform.zeit.value="";
   }
   document.sendform.submit();
   return true;
}