function _highlight() {
		var _bga = document.getElementById('op1');
		var _bgb = document.getElementById('op2');
		var _txta = document.getElementById('op1txt');
		var _txtb = document.getElementById('op2txt');
		
		if(document.all) {
			_color = '#808080';
		} else {
			_color = 'rgb(128, 128, 128)'
		}
		
		if (_txtb.style.color == _color) {
			_bga.style.backgroundImage = 'url(/i/2007/mdc/roadblock/op_topb.gif)';
			_bgb.style.backgroundImage = 'url(/i/2007/mdc/roadblock/op_botb.gif)';
			_txta.style.color = '808080';
			_txtb.style.color = '000000';
			
		} else {
			_bga.style.backgroundImage = 'url(/i/2007/mdc/roadblock/op_top.gif)';
			_bgb.style.backgroundImage = 'url(/i/2007/mdc/roadblock/op_bot.gif)';
			_txta.style.color = '000000';
			_txtb.style.color = '808080';
		}
	}