var gl_nav_button_array = new Array;

function opencat ( cat_id ) 
{
	if(cat_id)
	{
		document.location.href = "index.php?cat_id="+cat_id;
	}
}

function openmenu ( but_id ) 
{

		if(document.getElementById(but_id + '-closed'))
		{
			if (document.getElementById(but_id +'-open').style.display == "block")
			{//close the button
				document.getElementById(but_id + '-closed').style.display = "block";
				document.getElementById(but_id +'-open').style.display = "none";
				document.getElementById(but_id +'-inner').style.display = "none";
			}
			else 
			{//open the button and close all the other buttons
				for(var j in gl_nav_button_array)
				{
					if (j != but_id && document.getElementById(j + '-closed') && document.getElementById(j +'-open').style.display == "block")
					{ //close the button
						document.getElementById(j + '-closed').style.display = "block";
						document.getElementById(j +'-open').style.display = "none";
						document.getElementById(but_id +'-inner').style.display = "none";
					}
				}
				document.getElementById(but_id + '-closed').style.display = "none";
				document.getElementById(but_id +'-open').style.display = "block";
				document.getElementById(but_id +'-inner').style.display = "block";
			}
		}
}