function show_menu(id)
{
	//alert('in show menu');
	var obj = document.getElementById(id);
	obj.style.display = 'block';
}
function hide_menu(id)
{

	var obj = document.getElementById(id);
	obj.style.display = 'none'
}
function ChangeImage (ImageName,FileName) {
document[ImageName].src = FileName;
}