dom = (document.getElementById) ? true : false;
nn4 = (document.layers) ? true : false;
ie = (document.all) ? true : false;
ie4 = ie && !dom;



function changeElem(elemId) {
	if(document.layers)return;
	if(dom)
	if(document.getElementById(elemId).style.display == "block"){
		document.getElementById(elemId).style.display = "none"
		a = document.getElementById(elemId+"-Img")
		if(a) a.src = "images/aux-plus.gif"
	}
	else{
		document.getElementById(elemId).style.display = "block"
		a = document.getElementById(elemId+"-Img")
		if(a) a.src = "images/aux-minus.gif"
	}
	else if (ie4)
	if(document.all[elemId].style.display == "block"){
		document.all[elemId].style.display = "none";
		a = document.all[elemId+"-Img"];
		if(a) a.src = "images/aux-plus.gif"
	}
	else{
		document.all[elemId].style.display = "block";
		a = document.all[elemId+"-Img"];
		if(a) a.src = "images/aux-minus.gif"
	}
}