var speed;
function startIt(da){
if(da == 'l'){
speed = 7;
} else {
speed = -7;
}
mierda = setInterval("moveIt()",50);
}

function moveIt(){
limitleft = -5500;
num = parseInt(document.getElementById('gallery').style.left.replace("px",""));
num += parseInt(speed);
if(num > 0){
document.getElementById('gallery').style.left = "0px";
} else if (num < limitleft) {
document.getElementById('gallery').style.left = limitleft+"px";
} else {
document.getElementById('gallery').style.left = num+"px";
}
}

function clearIt(){
clearInterval(mierda);
}