function menu_navigation(main_menu){
	var div_navigat = document.getElementById('qm0');
	var anchor_tag = document.getElementById('qm0').getElementsByTagName("a");					
	
	for(var i=0; i<=anchor_tag.length; i++){
		//alert(anchor_tag[i].tagName);
		if(anchor_tag[i].id == main_menu){
			//alert(anchor_tag[i].href);
			anchor_tag[i].className='qmactive';
		} else {
			anchor_tag[i].className='qmparent';
		}
							
	}
}