function centerPopUp( url, name, width, height, scrollbars, toolbar ) {

	   if( scrollbars == null ) scrollbars = "0"
	   if( toolbar == null ) toolbar = "0"

	   str  = "";
	   str += "resizable=1,titlebar=0,menubar=0,toolbar=" + toolbar + ",location=0,directories=0,status=1,";
	   str += "scrollbars=" + scrollbars + ",";
	   str += "width=" + width + ",";
	   str += "height=" + height + ",";
	   if ( window.screen ) {
		  var ah = screen.availHeight - 30;
		  var aw = screen.availWidth - 10;

		  var xc = ( aw - width ) / 2;
		  var yc = ( ah - height ) / 2;

		  str += ",left=" + xc + ",screenX=" + xc;
		  str += ",top=" + yc + ",screenY=" + yc;
	   }
	   window.open( url, name, str );
    }



bilderoffnav= new Array();
for (i = 1; i <= 7; i++) {
   bilderoffnav[i] = new Image() ;
	bilderoffnav[i].src = "../_navpics/but-nav" + i +"off.gif";  
}
bilderonnav= new Array();
for (i = 1; i <= 7; i++) {
   bilderonnav[i] = new Image() ;
	bilderonnav[i].src = "../_navpics/but-nav"+ i +"on.gif";  
}

var ooc_clicked = null;

function activatenav(ooc_name) {
	document[ooc_name].src = bilderonnav[ooc_name.substring(3,ooc_name.length)].src;
}

function DeActivatenav(ooc_name) {
if (ooc_clicked != ooc_name) {
	document[ooc_name].src = bilderoffnav[ooc_name.substring(3,ooc_name.length)].src;
}
}
function setClicknav(ooc_name) {
	document[ooc_name].src = bilderonnav[ooc_name.substring(3,ooc_name.length)].src;
	ooc_clicked = ooc_name;
}





bilderofftop= new Array();
for (i = 1; i <= 2; i++) {
   bilderofftop[i] = new Image() ;
	bilderofftop[i].src = "../_navpics/but-top" + i +"off.gif";  
}
bilderontop= new Array();
for (i = 1; i <= 2; i++) {
   bilderontop[i] = new Image() ;
	bilderontop[i].src = "../_navpics/but-top"+ i +"on.gif";  
}

function activatetop(ooc_name) {
	document[ooc_name].src = bilderontop[ooc_name.substring(3,ooc_name.length)].src;
}

function DeActivatetop(ooc_name) {
	document[ooc_name].src = bilderofftop[ooc_name.substring(3,ooc_name.length)].src;
}