function tabMouseOver( id ) {
	var handle = document.getElementById( id );

	setOpacity( handle, 50 );
}

function tabMouseOut( id ) {
	var handle = document.getElementById( id );

	setOpacity( handle, 100 );
}


function setOpacity(obj, opacity) {
	opacity 						= (opacity == 100) ? 99.9999999 : opacity;
	
	obj.style.filter 			= "alpha(opacity:"+opacity+")";	// IE/Win
	obj.style.KHTMLOpacity 	= opacity / 100;  					// Safari<1.2, Konqueror
	obj.style.MozOpacity 	= opacity / 100;  					// Older Mozilla and Firefox
	obj.style.opacity 		= opacity / 100;  					// Safari 1.2, newer Firefox and Mozilla, CSS3
}