function toggleVisible(treepart){
	if (document.getElementById(treepart).style.visibility == "hidden"){
		document.getElementById(treepart).style.position="";
		document.getElementById(treepart).style.visibility="";
		if(document.images["i"+treepart]){
			document.images["i"+treepart].src="images/pix/minus.png";
		}
	}else{
		document.getElementById(treepart).style.position="absolute";
		document.getElementById(treepart).style.visibility="hidden";
		if(document.images["i"+treepart]){
			document.images["i"+treepart].src="images/pix/plus.png";
		}
	}
}

function calculateTotalSum(){
	i=0;
	summa=0;
	while(document.cartform.elements[i].value!="all"){
		hind=document.cartform.elements[i++].value;
		kogus=document.cartform.elements[i++].value;
		summa=summa+hind*kogus;
	}
	document.cartform.totalsum.value=summa;
}