function colSelect(col){
	if(col.parentNode.selected){
		toggleClassName("selecionada",col.parentNode.selected);
	}
	toggleClassName("selecionada",col);
	col.parentNode.selected = col;
}


function toggleClassName(_class,_node){
	if(_node.className.indexOf(_class) > -1){
		_node.className = _node.className.replace(_class,"");
	}else{
		_node.className += " " + _class;
	}
	
}