// JavaScript Document
function qiehuan(a, b)
{	
	document.getElementById('leftoreli').style.backgroundImage='url(../images/oreli.jpg)';
	document.getElementById('introduce').style.display='none';
	document.getElementById('leftoreli').style.color='#c3c1c1';
	document.getElementById('rightoreli').style.backgroundImage='url(../images/oreli.jpg)';
	document.getElementById('spec').style.display='none';
	document.getElementById('rightoreli').style.color='#c3c1c1';
	
	document.getElementById(a).style.display='';
	document.getElementById(b).style.backgroundImage='url(../images/orelihover.jpg)';
	document.getElementById(b).style.color='#313131';
}