function change(pictureID, pictureName)
{ 
	if (document.images)
	{
		document.images[pictureID].src=pictureName;
	}
}

var ns = navigator.appName == 'Netscape';
		var ie = navigator.appName == 'Microsoft Internet Explorer';
		var version = parseInt(navigator.appVersion);
		var system = "";
 			if (window.fenster)
   				 {
   					 fenster.close();
   				 }
		if(navigator.appVersion.indexOf("Mac") >0 ){
	      		 mac=true;
				}else{
       		 mac=false;
		}

		function enter_preview(seite,w,h){
			props = "width="+w+",height="+h+",resizable=no,scrollbars=yes,status=no,toolbar=no";
  			if(ie){
   			 dummy = window.open(seite,'fenster',props)
 				 } else {
   			 if(mac){
      				dummy = window.open(seite,'fenster',props)
    				} else {
    				  dummy = window.open(seite,'fenster',props);
        			  if(typeof(dummy.focus) == "function"){
       			     dummy.focus();
       			   }
		    }
		  }
		}