var ie = document.all&&!window.opera?1:0;
var dom = document.getElementById?1:0;
var ns4 = document.layers?1:0;


function init() {

if(!(ie)) {
return;
}

else if(ie) {
box = document.all.dropbox.style;
boxheight = document.all.dropbox.offsetHeight;
}

else if(dom) {
box = document.getElementById("dropbox").style;
boxheight = document.getElementById("dropbox").offsetHeight;
}

else if(ns4) {
box = document.dropbox;
boxheight = box.clip.height;
}

scroll_top=(ie)?document.body.scrollTop:window.pageYOffset;
box.top = scroll_top - boxheight;
speed = 100;
dropIn();
}

function dropIn() {

 speed+=0;

 if(parseInt(box.top) < scroll_top ) {
  box.top = parseInt(box.top) + 5;
  in_timer = setTimeout("dropIn()", 0);
 }

 else {
  clearTimeout(in_timer);
 }
}


function dropOut() {

 if(parseInt(box.top) > (-1)*boxheight) {
  box.top = parseInt(box.top) - 40;
  out_timer = setTimeout("dropOut()", 50);
 }

 else {
  clearTimeout(out_timer);
 }
}

window.onload=init;