function menuShow(id){
    var a = document.getElementById('menu');
	var b = document.getElementById('menu_' + id);
	var c = document.getElementById('menu_' + id + '_popup');
	b.style.position = 'relative';
	c.style.display = 'block';
	c.style.top = b.offsetTop + 72;
	if(navigator.userAgent.indexOf("MSIE") != -1){
    	c.style.left = b.offsetLeft;
    }else if(navigator.userAgent.indexOf("Firefox") != -1){
    	c.style.left = b.offsetLeft + 'px';
	}else{
    	c.style.left = parseInt(a.offsetLeft + b.offsetLeft) + 'px';
	}
	c.style.width = b.width;
}
function menuHide(id){
	var c = document.getElementById('menu_' + id + '_popup');
	c.style.display = 'none';
}