var mnav=function(num){
	var m=document.getElementById('mnav');
	if(m){
		var a=m.getElementsByTagName('a');
		a[num].className='sel';
		m.style.backgroundPosition=95*num+'px 0';
	}
}
var catalog_ck=function(obj){
	if(obj.parentNode.className=='sel'){
		obj.parentNode.className='';
	}else{
		obj.parentNode.className='sel';
	}
}