if (navigator.userAgent.indexOf("Mozilla/4.") != -1) {
	if (navigator.userAgent.indexOf("MSIE") != -1)
		 document.write('<link rel="STYLESHEET" type="text/css" href="css/zonta-ie.css">');
	else document.write('<link rel="STYLESHEET" type="text/css" href="css/zonta-ns.css">');
 } else document.write('<link rel="STYLESHEET" type="text/css" href="css/zonta-ie.css">');


var isNS6_1 = (navigator.userAgent.indexOf('Netscape6/6') != -1) ? true : false;
var isNS6_2 = (navigator.userAgent.indexOf('Netscape/6') != -1) ? true : false;

if (isNS6_1 != true && isNS6_2 != true) {
	if (document.images) {
		var picName = new Array("about_us","projects","internal","archive","links","home","arts","music","regio","internat","chron");	
		var picHighlighted = new Array();
		var picNormal = new Array();
		var ext;
		var pre;
	
		var picActual;
		for (var i=0;i<picName.length;i++) {
			picActual = picName[i];
			ext = '.jpg';
			pre = (document.URL.indexOf("index")!=-1)?'images/':'../images/';
			pre = (document.URL.indexOf("int_")!=-1)?'../../images/':pre;
			picHighlighted[picActual] = new Image();
			picHighlighted[picActual].src = pre + 'bth_'+picName[i] + ext;
			picHighlighted[picActual].alt = picName[i];
		
			picNormal[picActual] = new Image();
			picNormal[picActual].src = pre + 'btn_'+picName[i] + ext;
			picNormal[picActual].alt = picName[i];	
		}
	}
}


function changeButton(pictureName,mode) {
	var picSource;
	if (isNS6_1 != true && isNS6_2 != true) {
		if (mode=="on")
			document.images[pictureName].src =  picHighlighted[pictureName].src;
		else 
			document.images[pictureName].src =  picNormal[pictureName].src;
	}
}

function switchImage(label) {
  if (document.layers) {
	document.logogrey.document.images.picloc.src = label;
  }
  else {
	document.picloc.src = label;
  }
 }
 
 

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		if (rslt.src) return rslt;
		else {
			rslt.src = "../../"+arg ;
			return rslt;
		}	
	}
}

function changeImages() {
	if (document.images && preloadFlag) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}
		
var preloadFlag = false;


function preloadImages() {
	// images folder on level beyond index, indexd, indexe, indexf with language dependent images
	// global images folder on level index
	// index = default home
	// indexd = home German
	// indexe = home English
	// indexf = home French
		
	if (document.images) {

		about_over = 		newImage("images/bth_about.gif"); 
		about_normal = 		newImage("images/btn_about.gif");
		archive_over = 		newImage("images/bth_archive.gif");
		archive_normal = 	newImage("images/btn_archive.gif");
		links_over = 		newImage("images/bth_links.gif");
		links_normal = 		newImage("images/btn_links.gif");
		internal_over = 	newImage("images/bth_internal.gif");
		internal_normal = 	newImage("images/btn_internal.gif");
		home_over = 		newImage("images/bth_home.gif");
		home_normal = 		newImage("images/btn_home.gif");
		projects_over = 	newImage("images/bth_projects.gif");
		projects_normal = 	newImage("images/btn_projects.gif");
		arts_over = 		newImage("images/bth_arts.gif");
		arts_normal = 		newImage("images/btn_arts.gif");		
		music_over = 		newImage("images/bth_music.gif");
		music_normal = 		newImage("images/btn_music.gif");		
		regio_over = 		newImage("images/bth_regio.gif");
		regio_normal = 		newImage("images/btn_regio.gif");
		internat_over = 	newImage("images/bth_internat.gif");
		internat_normal = 	newImage("images/btn_internat.gif");
		gallery_over =	 	newImage("images/bth_gallery.gif");
		gallery_normal = 	newImage("images/btn_gallery.gif");
		actual_over =	 	newImage("images/bth_actual.gif");
		actual_normal = 	newImage("images/btn_actual.gif");
		jubi_over =	 		newImage("images/bth_jubi.gif");
		jubi_normal = 		newImage("images/btn_jubi.gif");
		zonta_over =	 	newImage("images/bth_zonta.gif");
		zonta_normal = 		newImage("images/btn_zonta.gif");
		// images in global images folder and on local level
		map_over_mulh = 	newImage("../../images/index_mulh.gif");	
		map_over_loe = 		newImage("../../images/index_loe.gif");
		map_over_bsl = 		newImage("../../images/index_basel.gif");
		map_normal = 		newImage("../../images/logo_grau.gif");
	
		preloadFlag = true;
	}
}