_arrSel = document.getElementsByTagName("SELECT");

function _hidePredObj(ig,s){
	_s = (s == false) ? "hidden" : "visible";
	for(i = 0; i < _arrSel.length; i++){
		try{
			if(!_arrSel[i].form.name.indexOf(ig)){
				_arrSel[i].style.visibility = _s;
			}
		} catch(e){
			_arrSel[i].style.visibility = _s
		}
	}
}

function getObj(s){
	if(document.layers){
		return document.layers[s];
	} else if (document.all && !document.getElementById){
		return document.all[s];
	} else {
		return document.getElementById(s);
	}
}

function banner_redim(s,x,y,h){
	_Obj = getObj(s);
	_Obj.style.clip = 'rect(0px '+x+'px '+y+'px 0px)';
	_hidePredObj('',h);
}