function showContent(cont){
	var str = location.href;
	str = str.substring(0,str.indexOf("nav.htm"));
	str = str + 'content/'+cont+'.htm';
	if(str != parent.content.location.href){
		parent.content.location.href=str;
	}
}


var main_nav_array = new Array


var im_Array = new Array();
var im_names_Array = new Array();
var norm_suffix = '.gif';
var ro_suffix = '_ro.gif';
var hi_suffix = '_hi.gif';
var active_bt_ix = 0;

function preloadImages(imageNames) {
	
	var pfad = 'img/';
	im_names_Array = imageNames;
	var anzahl = im_names_Array.length;
	for(i=0; i<anzahl; i++){
		//alert(eval('document.images.'+im_names_Array[i]+'.src'));
		//var im = eval('document.images.'+im_names_Array[i]+'.src');
		var k = '0'+(i+1);
		var im = 'img/'+k+'.gif';
		var bt_ar = new Array(3);
		bt_ar[0] = new Image;
		bt_ar[0].src = im;
		bt_ar[1] = new Image;
		var im_stub = im.substring(0,im.indexOf('.gif'));
		bt_ar[1].src = im_stub+ro_suffix;
		bt_ar[2] = new Image;
		bt_ar[2].src = im_stub+hi_suffix;
		
    	im_Array[i] = bt_ar;
    }
}

function showPressed(imObj){
	if (active_bt_ix != null){
		var actObj = im_names_Array[active_bt_ix];
		resetActBt(actObj);
	}
	
	var ix = getObjPos(imObj);
	//alert(ix);
	document.images[imObj].src = im_Array[ix][2].src;
	active_bt_ix = ix;
}

function showRollover(imObj){
	showNormal();
	var ix = getObjPos(imObj);
	if(ix != active_bt_ix){
		document.images[imObj].src = im_Array[ix][1].src;
	}
}

function showNormal(){
	var co = im_names_Array.length;
	for(ix=0;ix<co;ix++){
		imObj = im_names_Array[ix];
		//var ix = getObjPos(imObj);
		if(ix != active_bt_ix){
			document.images[imObj].src = im_Array[ix][0].src;
		}
	}
}

function resetActBt(imObj){
	var ix = getObjPos(imObj);
	document.images[imObj].src = im_Array[ix][0].src;
}

function getObjPos(imObj){
	var ix = null;
	var co = im_names_Array.length;
	for(i=0;i<co;i++){
		if(im_names_Array[i]==imObj){
			ix = i;
			break;
		}
	}
	return(ix);
}