function details(loc) {
	if(document.getElementById){
		var foc = loc.firstChild;
      	foc = loc.firstChild.innerHTML?loc.firstChild:loc.firstChild.nextSibling;
      	foc.innerHTML = foc.innerHTML=='+'?'-':'+';
      	foc = loc.parentNode.nextSibling.style?loc.parentNode.nextSibling:loc.parentNode.nextSibling.nextSibling;
      	foc.style.display = foc.style.display=='block'?'none':'block';
	}
}