var ie = document.all&&!window.opera?1:0;
var dom = document.getElementById?1:0;
var ns4 = document.layers?1:0;
function init() {
if(!(ie||dom||ns4)) {
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 = 1;
dropIn();
}
function dropIn() {
speed+=6;
if(parseInt(box.top) < scroll_top ) {
box.top = parseInt(box.top) + speed;
in_timer = setTimeout("dropIn()", 50);
}
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;
document.writeln("
");
document.writeln("
");document.writeln("
");