function openItem1( url ) {
      newWindow = window.open(url,
        "newGebruikersnaamWin",
        "width=800,height=600,left=100,top=100,resizable=no,menubar=no,directories=no,toolbar=no,scrollbars=no"
      )
    }

    function openItem2( url ) {
      newWindow = window.open(url,
        "newGebruikersnaamWin",
        "width=800,height=660,left=100,top=100,resizable=no,menubar=no,directories=no,toolbar=no,scrollbars=no"
      )
    }

    function openItem3( url ) {
      newWindow = window.open(url,
        "newGebruikersnaamWin",
        "width=800,height=700,left=100,top=100,resizable=no,menubar=no,directories=no,toolbar=no,scrollbars=no"
      )
    }

    function openItem4( url ) {
      newWindow = window.open(url,
        "newGebruikersnaamWin",
        "width=800,height=740,left=100,top=100,resizable=no,menubar=no,directories=no,toolbar=no,scrollbars=no"
      )
    }

    function openItem5( url ) {
      newWindow = window.open(url,
        "newGebruikersnaamWin",
        "width=800,height=760,left=100,top=100,resizable=no,menubar=no,directories=no,toolbar=no,scrollbars=no"
      )
    }

    function openItem6( url ) {
      newWindow = window.open(url,
        "newGebruikersnaamWin",
        "width=640,height=503,left=100,top=100,resizable=no,menubar=no,directories=no,toolbar=no,scrollbars=no"
      )
    }