function get_object(id) 
{
	var object = null;
	if (document.layers) 
	{   
		object = document.layers[id];
	} else if (document.all)
	{
		object = document.all[id];
	}else if (document.getElementById) 
	{
		object = document.getElementById(id);
	}
    return object;
}

function validate(email) {
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   var address = email;
   if(reg.test(address) == false) {
      return false;
   }
   return true;
}

function on_item_over(type)
{
	get_object(type).style.display = 'block';
}

function on_item_out(type)
{
	get_object(type).style.display = 'none';
}

function on_menu_over(type)
{
	if(get_object(type) != null)
	{
		get_object(type).style.display = 'block';
		if(get_object('g_act') != null)
		{
			get_object('g_act').style.display = 'none';
		}
	}
	else
	{
		if(get_object('g_act') != null)
		{
			get_object('g_act').style.display = 'block';
		}
	}
}

function on_menu_out(type)
{
	if(get_object(type) != null)
	{
		get_object(type).style.display = 'none';
		if(get_object('g_act') != null)
		{
			get_object('g_act').style.display = 'block';
		}
	}
	else
	{
		if(get_object('g_act') != null)
		{
			get_object('g_act').style.display = 'block';
		}
	}
}