CODE EXAMPLE FOR JAVASCRIPT

javascript loop exec function

var i, factor, 
    duration = 250,
    delayTime = 500;

for (i = 2, factor = 0; i <= 4; i++, factor++) {
    galleryAnimation(i, factor);
}

function galleryAnimation(i, factor) {
    $("#pic" + i).delay(factor * delayTime).fadeIn(duration);
}