function getElement(aID){ 
     return (document.getElementById) ? document.getElementById(aID)
                                      : document.all[aID];
		
} 

function rollin(x) {
	original = getElement("photo0").src;
	leg_orig = getElement("legende").innerHTML;
	getElement("photo0").src = galery[x][0].src;
	getElement("legende").innerHTML=galery[x][1];
	getElement("comment").innerHTML=galery[x][3];
}

function rollout() {
	getElement("photo0").src = original;
	getElement("legende").innerHTML=leg_orig;
	getElement("comment").innerHTML="";
}

function pers(x,y) {
	original = getElement("photo0").src;
	leg_orig = getElement("legende").innerHTML;
	getElement("photo0").src = x;
	getElement("legende").innerHTML= y;
}