function OpenWindow(sImg, nWidth, nHeight)
{
	var scrollbars = "no";
	var nWindowWidth = window.screen.width;
	var nWindowHeight = window.screen.height - 48;
		
	if (nWidth > nWindowWidth)
	{
		if (scrollbars == "yes")
		nWidth = nWindowWidth - 16;
		else
		nWidth = nWindowWidth;
		scrollbars = "yes";
	}
			
	if (nHeight > nWindowHeight)
	{
		nHeight = nWindowHeight;
		nWidth = nWidth + 16;
		scrollbars = "yes";
	}
		
	var nTop = (nWindowHeight - nHeight) / 2;
	var nLeft = (nWindowWidth - nWidth) / 2;
		
	var sFeatures = "resizable=no, scrollbars=" + scrollbars + ", status=no, titlebar=yes, toolbar=no, width=" + nWidth + "px, height=" + nHeight + "px, left=" + nLeft + "px, top=" + nTop + "px";
	var a = window.open(sImg, "_blank", sFeatures, false);
	a.focus();
}