function changeIt(ImageToChange, ImageToShow)
 {
	if (document.images)
	{
		document[ImageToChange].src = ImageToShow;
	} 
 }

 function bar(message)
 {
	if (document.images)
	{
		window.status = message; return true
	}
 }

function showFenster(datei,name,w,h)
{

    var dorthin = null;

    if (window.screen)
    {
        var hori = screen.availWidth;
        var verti = screen.availHeight;
        dorthin = window.open(datei,name,'width='+ w  +',height='+ h +',left='+((hori - w- 10)* .5) +',top='+((verti - h- 30)* .5))
	dorthin.focus()
    }
}