function showImpressum(){
    ljex.Window.zindex=1000;

    var iwin=new ljex.Window({
        id: 'popupWindow',
        title: 'Impressum',
        html: '<div id="divImpressum"></div>',
        width: 900,
        center: true,
        focusOpacity: true,
        parentId: 'page'
    });
    
    iwin.open(true);

	 new ljex.Ajax({
		url: '../index.php5?page=impressum',
		scope: this,
		callback: function(response){
			var htmlText = response.responseText;
			
			$('divImpressum').innerHTML=htmlText;

			iwin.show();

		}
	}).request();
}