var iHoverTime = 300;
var tmrHover;
var idHover = -1;

function onHover(sNum, sImg)
{
	clearTimeout(tmrHover);
	if (sNum != idHover)
	{
		tmrHover = setTimeout("doHover("+ sNum +", '"+ sImg +"')", iHoverTime);
	}
}

function offHover(sNum, sImg)
{
	clearTimeout(tmrHover);
	idHover = -1;
	for (i = 1; i < 4; i++)
	{
		document.getElementById('img'+ i).style.display = '';
	}
	document.getElementById('img'+ sNum).src = 'page_images/'+ sImg;
}

function doHover(sNum, sImg)
{
	for (i = 1; i < 4; i++)
	{
		var t = document.getElementById('img'+ i);
		t.style.display = 'none';
	}
	var t = document.getElementById('img'+ sNum);
	t.style.display = '';
	t.src = 'page_images/'+ sImg;

	idHover = sNum;
}

function preloadImg()
{
	a = preloadImg.arguments;
	m = a.length;
	for (i = 0; i < m; i++)
	{
		t = new Image();
		t.src = a[i];
	}
}