var o = new Object;
var p = new Object;
var nav = new Array('','s','g','bg');
var overpix = new Array();
    for(i=0;i<nav.length;i++){
        overpix[i]=new Image();
        overpix[i].src="material/navigation/"+nav[i]+"nav_over.gif"
	}

function rein(nav,no){
	if(document.images){
        o = document.images[nav+'nav'+no].src;
        document.images[nav+'nav'+no].src="material/navigation/"+nav+"nav_over.gif";
        return p = document.images[nav+'nav'+no]
	}
}

function raus(){
	if(document.images){
        p.src=o;
	}
}

function nav2null(){
    document.forms[0].reset();
    return true
}

function Go2(uri){
    if(uri==""){
        nav2null()
    }
    else{
        location.href=uri
    }
}

if(window.opera){plat_nav="op";}
else if(document.layers){plat_nav="ns";}
else if(document.getElementById&&!document.all){plat_nav="moz";}