function showHide(obj) {
	if (document.getElementById(obj).className.indexOf("coll")>=0){
	 document.getElementById(obj).className = document.getElementById(obj).className.replace("coll","exp");
	 }
	 else{
		 document.getElementById(obj).className = document.getElementById(obj).className.replace("exp","coll");
	}
}

function show(obj) { document.getElementById(obj).className = document.getElementById(obj).className.replace("coll","exp");}

function hide(obj) { document.getElementById(obj).className = document.getElementById(obj).className.replace("exp","coll");}