function hilite_tab( tab, section ) {

	if( current_section == section ) return;

	tab.src = images['g_' + section].src;

} //end function

function lolite_tab( tab, section ) {

	if( current_section == section ) return;

	tab.src = images['b_' + section].src;

} //end function

function select_tab( tab, section ) {

	if( current_tab == '' ) current_tab = document.getElementById( 'init_tab' );

	//hide the old section & tab...
	current_tab.src = images['b_' + current_section].src;
	document.getElementById( 'section_' + current_section ).style.display = 'none';

	//set the selcted tab and section to current status	
	current_tab = tab;
	current_section = section;

	//show the new section & tab...
	tab.src = images['w_' + section].src;
	document.getElementById( 'section_' + section ).style.display = 'block';

} //end function