function SlideNavs(val){
	if(document.active_nav!=true){
		show(val);
	}else{
		if(val!=document.active_nav_id){
		var restore=document.getElementById(document.active_nav_id);
		Effect.BlindUp(restore, {duration:0.5, afterFinish:function(){show(val);}});
		}else{
			var restore=document.getElementById(document.active_nav_id);
			Effect.BlindUp(restore, {duration:0.5});
			document.active_nav=false;
		}
	}
}
	
function show(val){
	Effect.BlindDown(val, {duration:0.5});
		document.active_nav=true;
		document.active_nav_id=val;
}