function set_background(Cell,flag)
{
	if(flag)
	{
		Cell.style.backgroundColor = "2290E0";
		Cell.cells[0].innerHTML = "<img src='http://www.caac.gov.cn/English/images/dot_white.gif' width='16' height='13'>";
		Cell.cells[1].getElementsByTagName( 'a' )[0].style.color = "FFFFFF";
	}
	else
	{
		Cell.style.backgroundColor = "FFFFFF";
		Cell.cells[0].innerHTML = "<img src='http://www.caac.gov.cn/English/images/pic_dot2.gif' width='16' height='13'>";
		Cell.cells[1].getElementsByTagName( 'a' )[0].style.color = "085085";
	}
}

//set menu style(display or hidden)
function change_menu(divname)
{
	if(document.getElementById(divname).style.display == "none")
	{
		document.getElementById(divname).style.display = "block";
	}
	else
	{
		document.getElementById(divname).style.display = "none";
	}

}