var b = 1;
var c = true;

function fade(){
if(document.all);

if(c == true) {
b++;
}
if(b==100) {
b--;
c = false
}

if(b==10) {
b++;
c = true;
}

if(c == false) {
b--;
}
u.filters.alpha.opacity=0 + b;
setTimeout("fade()",50);
}