var fade = 0;
var interval = 200;
var obj;

function fade_in(){
if(fade <= 10){
obj = document.getElementById("fade_in");
obj.style.filter = "alpha(opacity=" + (fade * 10) + ")";
obj.style.MozOpacity = fade / 10 ;
obj.style.opacity = fade / 10 ;
fade++;
setTimeout('fade_in()',interval);
}
}