function slideIt(){
var slidingDiv = document.getElementById("container");
var stopPosition = 0;
if (parseInt(slidingDiv.style.left) < stopPosition ) {
slidingDiv.style.left = parseInt(slidingDiv.style.left) + 10 + "px";
setTimeout(slideIt, 1);
}
}

function hideIt(){
var slidingDiv = document.getElementById("container");
var stopPosition = -200;
if (parseInt(slidingDiv.style.left) > stopPosition ) {
slidingDiv.style.left = parseInt(slidingDiv.style.left) - 10 + "px";
setTimeout(hideIt, 1);
}
}