collpth="images/";
collshw="plus.gif";
collhde="minus.gif";
DivBehaviour = "block"; //"inline" or "block" (starts a new line)
function c_all(chmax){
	img=document.getElementById("img_global");
	if(img.src.indexOf(collshw)>=0) { 
		img.src = collpth+collhde; for (i=0;i<chmax;i++) c_show(i);
	} else { 
		img.src = collpth+collshw; for (i=0;i<chmax;i++) c_hide(i);
	}
}
function c_hide(ch){
	img = document.getElementById("img"+ch);
	panel= document.getElementById("pan"+ch);
	img.src=collpth+collshw;
	panel.style.display="none";
}
function c_show(ch){
	img = document.getElementById("img"+ch);
	panel= document.getElementById("pan"+ch);
	img.src=collpth+collhde;
	panel.style.display=DivBehaviour;
}
function c_change(ch){
	img = document.getElementById("img"+ch);
	panel= document.getElementById("pan"+ch);
	if (img.src.indexOf(collshw)>=0) {
		img.src=collpth+collhde;
		panel.style.display=DivBehaviour;
	} else {
		img.src=collpth+collshw;
		panel.style.display="none";
	}
}