var newWindow

function openWindow(url) {
if (!newWindow || newWindow.closed) {
newWindow =
window.open(url,"projekt","toolbar=0,menubar=0,scrollbars=1,resizable=1,innerHeight=300,innerWidth=400,height=400,width=500,screenX=300,screenY=200,dependent=no")
newWindow.location.href = url
if (!newWindow.opener) {
newWindow.opener = window
       }
} else {
// window's already open; bring to front
newWindow.focus()
newWindow.location.href = url
}
}