function serviceCg(num){	
	document.getElementById("text"+num).style.backgroundImage='url(images/service_bg2_1.gif)';
	document.getElementById("bg"+num).style.backgroundImage='url(images/service_bg3_1.gif)';
}
function serviceCgb(num){	
	document.getElementById("text"+num).style.backgroundImage='url(images/service_bg2.gif)';
	document.getElementById("bg"+num).style.backgroundImage='url(images/service_bg3.gif)';
}


var ns = (navigator.appName.indexOf("Netscape") != -1);
var autobannerId=0;
var t;


function chgBanner(bannerId){
	for(i=1;i<4;i++){
		document.getElementById("bannerTxt"+i).style.display='none';
		document.getElementById("bannerImg"+i).className='';
	}
	
	document.getElementById("bannerTxt"+bannerId).style.display='';
	document.getElementById("bannerImg"+bannerId).className='hover';
	
}

function chkBanner(bannerId){
	chgBanner(bannerId)
	autobannerId=bannerId;
	clearTimeout(t);
	t=window.setTimeout("autoChgBanner()",5000);
}



function autoChgBanner(){
	if (autobannerId>2)
		autobannerId=1;
	else
		autobannerId=autobannerId+1;
	chgBanner(autobannerId);
	t=window.setTimeout("autoChgBanner()",5000)
	
}
window.onload = function(){   
        autoChgBanner()  
    }  

document.getElementById("qqonline").innerHTML="<a href='http://wpa.qq.com/msgrd?V=1&Uin=187398695&Site=ttkc&Menu=yes' target='_blank'><img border='0' src='/images/qq.gif'> 客服QQ:187398695</a>";