var t;
var current_lyr = '';

function dropdown(status, lyr)
{
	if(status == 'in')
	{
		document.getElementById(lyr).className = 'show';
		clearTimeout(t);
	}

	if(status == 'out')
		t = setTimeout("hide('" + lyr + "')", 500);	
}

function hide(lyr)
{
	document.getElementById(lyr).className = 'hide';	
}

function swap_lyr(lyr)
{
	if(current_lyr != lyr && current_lyr != '')
		document.getElementById(current_lyr).className = 'hide';
	document.getElementById(lyr).className = 'show';
	current_lyr = lyr;
}