var han=0;
function execEffect()
{
	if(han==1){
		han = 2;
		new Effect.MoveBy($("navMain"), 0,820,{duration:0.75});
	}
}
function stEffect()
{
		new Effect.MoveBy($("navMain"), 0,-820,{duration:0.75,afterFinishInternal: function(effect) {han=1;}});
}