var mainContent = 'maincontent';
var imageToResetName = null;
var imageToReset= null;

function setContent(page)
{
	document.getElementById(mainContent).innerHTML = '<iframe src="' + page + '" width="100%" height="100%" frameborder="0"></iframe>';
}

function roll(x, y, mod, img_name)
{
	if( (x+y) % mod == 1 )
	{
		index = (index+1)%images.length;
		document[img_name].src = images[index];
	}
}

function movePicReset(img_name, img_src)
{
	document[img_name].src = img_src;
	if( imageToResetName != null && imageToResetName != img_name )
	{
		document[imageToResetName].src = imageToReset;
	}
	imageToResetName = img_name;
	imageToReset = document[img_name].src.replace("_active","");
}