var countB = 0;
var countA = 0;

function fadeIn() {
	if(countB == 0) {
		document.getElementById('introImg').style.display = 'block';
	}
	document.getElementById('introImg').style.opacity = countA;
	document.getElementById('introImg').style.filter = "alpha(opacity="+countB+")";
	countB = countB+1;
	countA = countA + 0.01;
	if(countB < 100) {
		window.setTimeout("fadeIn()", 20);
	}
}