function changeIt(ImageToChange, ImageToShow)
    {
        if (document.images)
            { document[ImageToChange].src = ImageToShow; }
    }    
    
function ShowPopup(InfoURL,Naam,B,H,SB) 
{
    if (SB == 'R') 
        {
        R = '1';
        SB ='0';
        }
    else
        {
        R = '0';
        }
	// open the popup window
	window.name = 'VastgoedBasis';
	var popupURL = InfoURL;
  	var popup = window.open(popupURL,Naam,'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars='+SB+',resizable='+R+',left=10,top=10,width='+B+',height='+H);
	// set the opener if it's not already set.  it's set automatically
	// in netscape 3.0+ and ie 3.0+.
	if( navigator.appName.substring(0,8) == "Netscape" )
	{
		popup.location = popupURL;
	}
    popup.focus();
}

function EnableOnly () 
{
	// Disable all controls first, only to enable one of them later on 
	document.getElementById("sTypeID").disabled=true
	document.getElementById("sLiggingID").disabled=true
	document.getElementById("dDatum").disabled=true
	document.getElementById("sPeriodeID").disabled=true
}