var Arbeitsprobe = '';
var Navigation = '';

function arbeitsprobe(ID) {
	if(Arbeitsprobe!='') document.getElementById(Arbeitsprobe).style.display = 'none';

	Arbeitsprobe = ID;

	document.getElementById('Projektion').style.display = 'block';
	document.getElementById(Arbeitsprobe).style.display = 'block';
}

function arbeitsprobe_aus() {
	document.getElementById('Projektion').style.display = 'none';
}

function navi_load() {
	if(window.location.hash!='') {
		Navigation = window.location.hash.replace(/#/, '');
		document.getElementById('navi_'+Navigation).src = './medien/grafiken/navigation/_'+Navigation+'.gif';
	} /* else window.location.hash='#ahoi'; */
}

function navi_clear() {
	if(Navigation!='') document.getElementById('navi_'+Navigation).src = './medien/grafiken/navigation/'+Navigation+'.gif';

	Navigation = '';
}

function navi_click(ID) {
	if(Navigation!='') document.getElementById('navi_'+Navigation).src = './medien/grafiken/navigation/'+Navigation+'.gif';
	document.getElementById('navi_'+ID).src = './medien/grafiken/navigation/_'+ID+'.gif';

	Navigation = ID;
}

function navi_over(ID) {
	document.getElementById('navi_'+ID).src = './medien/grafiken/navigation/_'+ID+'.gif';
}

function navi_out(ID) {
	if(window.location.hash!='#'+ID) document.getElementById('navi_'+ID).src = './medien/grafiken/navigation/'+ID+'.gif';
}