164   // starting value for inertia

   165   var inertiabase = 1;

   166   // increment for inertia, or 0 to disable inertia effects

   167   var inertiainc  = 1;

   168   // when the progress reaches this %, deceleration is activated

   169   var divider = 0.666667;

   170   // multiplier for deceleration, setting this above 2 can cause some weird slowdown effects

   171   var decelerate  = 2; // 1 / divider; // reciprocal of the divider

   172   

   173   /*

   174    * Timer parameters

   175    * /

   176   

   177   // how long animation start is delayed, you want this at 0

   178   var timer = 0;

   179   // frame ttl

   180   var timestep = 12;

   181   // sanity check

   182   var frames = 0;

   183   

   184   // cache element so it can be changed from within setTimeout()

   185   var rand_seed = Math.floor(Math.random() * 1000000);

   186   fly_in_cache[rand_seed] = element;

   187   

   188   // set element left pos, you can comment this out to preserve left position

   189   element.style.left = left + 'px';

   190   

   191   // total distance to be traveled

   192   dist = abs(top - topi);

   193   

   194   // animation loop

   195   

   196   while ( true )

   197   {

   198     // used for a sanity check

   199     frames++;

   200     

   201     // time until this frame should be executed

   202     timer += timestep;

   203     

   204     // math stuff

   205     // how far we are along in animation...

   206     diff = abs(top - topi);

   207     // ...in %

   208     ratio = abs( 1 - ( diff / dist ) );

   209     // decelerate if we're more than 2/3 of the way there

   210     if ( ratio < divider )

   211       inertiabase += inertiainc;

   212     else

   213       inertiabase -= ( inertiainc * decelerate );

   214     

   215     // if the deceleration factor is anywhere above 1 then technically that can cause an infinite loop

   216     // so leave this in there unless decelerate is set to 1

   217     if ( inertiabase < 1 )

   218       inertiabase = 1;

   219     

   220     // uncomment to disable inertia

   221     // inertiabase = 3;

   222     

   223     // figure out frame Y position

   224     topi = ( abs_dir == FI_UP ) ? topi - inertiabase : topi + inertiabase;

   225     if ( ( abs_dir == FI_DOWN && topi > top ) || ( abs_dir == FI_UP && top > topi ) )

   226       topi = top;

   227     

   228     // tell the browser to do it

   229     setTimeout('var o = fly_in_cache['+rand_seed+']; o.style.top=\''+topi+'px\';', timer);

   230     if ( !nofade )

   231     {

   232       // handle fade

   233       opac_factor = ratio * 100;

   234       if ( direction == FI_OUT )

   235         opac_factor = 100 - opac_factor;

   236       setTimeout('var o = fly_in_cache['+rand_seed+']; domObjChangeOpac('+opac_factor+', o);', timer);

   237     }

   238     

   239     // if we're done or if our sanity check failed then break out of the loop

   240     if ( ( abs_dir == FI_DOWN && topi >= top ) || ( abs_dir == FI_UP && top >= topi ) || frames > 1000 )

   241       break;

   242   }

   243   

   244   timer += timestep;

   245   setTimeout('delete(fly_in_cache['+rand_seed+']);', timer);

   246   return timer;

   247   */