var isActiveNav = 0;
var arVersion = navigator.appVersion.split("MSIE")
var version = parseFloat(arVersion[1])

function pngOver(x,button){
	if ((version >= 5.5) && (document.body.filters)) 
	{
		if (x.style.filter.indexOf('_pg.png') != -1) { isActiveNav = 1; }
		x.style.filter='progid:DXImageTransform.Microsoft.AlphaImageLoader(src=\'assets/images/' + button + '.png\', sizingMethod=\'image\')';
		x.style.backgroundImage = 'url(\'assets/images/blank.gif\')';
	}
}

function pngOut(x,button){
	if ((version >= 5.5) && (document.body.filters)) 
	{
		if (!isActiveNav) { x.style.filter='progid:DXImageTransform.Microsoft.AlphaImageLoader(src=\'assets/images/' + button + '.png\', sizingMethod=\'image\')'; }
		else { x.style.filter='progid:DXImageTransform.Microsoft.AlphaImageLoader(src=\'assets/images/' + button + '_pg.png\', sizingMethod=\'image\')'; }
		x.style.backgroundImage = 'url(\'assets/images/blank.gif\')';
	}
	isActiveNav = 0;
}