function showContent(onselect){			
	
	var links = new Array('recommand_group','largest_group','newest_group');	
	for(var i = 0; i < links.length; i++){	
		if(onselect == links[i]){		
			document.getElementById(links[i]).style.display = '';
			document.getElementById(links[i]+'_ul').className = 'active';
		}else{
			document.getElementById(links[i]).style.display = 'none';
			document.getElementById(links[i]+'_ul').className = 'normal';
		}
		
	}	
}