function bpResultSet_mouseOverImage( id )
{
	if(document.images)
	{
		/* currently assuming 3-char extension */
		var basename = document.images['img_' + id].src;
		basename = basename.substring(0, basename.length - 4);
		
		/* ensure image doesn't get '_roll_roll'
		** can happen if rollover has different size to original
		*/
		if(basename.substring(basename.length - 5) == '_roll')
			return;
			
		document.images['img_' + id].src = basename + '_roll.png';
	}
}

function bpResultSet_mouseNotOverImage( id )
{
	if(document.images)
	{
		/* currently assuming 3-char extension */
		var basename = document.images['img_' + id].src;
		basename = basename.substring(0, basename.length - 4);
		
		if(basename.substring(basename.length - 5) == '_roll')
			basename = basename.substring(0, basename.length - 5);
			
		document.images['img_' + id].src = basename + '.png';
	}
}