var newwindow;
function venster(url)
{
	newwindow=window.open(url,'voorwaarden','height=600,width=600');
	if (window.focus) {newwindow.focus()}
}

function venstervoorwaarden(url)
{
	newwindow=window.open(url,'voorwaarden','height=600,width=600,scrollbars=yes');
	if (window.focus) {newwindow.focus()}
}

function userinfovenster(url)
{
	newwindow=window.open(url,'userinfo','height=250,width=300');
	if (window.focus) {newwindow.focus()}
}