function init() {
	proj_klik=0;
	real_klik=0;
	udrzba_klik=0;
	ostatni_klik=0;
	proj1_klik=0;
	proj2_klik=0;
	proj3_klik=0;
	real1_klik=0;
	real2_klik=0;
	real3_klik=0;
	real4_klik=0;
	udrzba1_klik=0;
	udrzba2_klik=0;
	udrzba3_klik=0;
	udrzba4_klik=0;
	ostatni1_klik=0;
	ostatni2_klik=0;
	ostatni3_klik=0;
	ostatni4_klik=0;
}

function klik_menu(co) {
	proj_klik=0;
	real_klik=0;
	udrzba_klik=0;
	ostatni_klik=0;
	proj1_klik=0;
	proj2_klik=0;
	proj3_klik=0;
	real1_klik=0;
	real2_klik=0;
	real3_klik=0;
	real4_klik=0;
	udrzba1_klik=0;
	udrzba2_klik=0;
	udrzba3_klik=0;
	udrzba4_klik=0;
	ostatni1_klik=0;
	ostatni2_klik=0;
	ostatni3_klik=0;
	ostatni4_klik=0;
	
	document.getElementById('proj').style.visibility = 'hidden';
	document.getElementById('real').style.visibility = 'hidden';
	document.getElementById('udrzba').style.visibility = 'hidden';
	document.getElementById('ostatni').style.visibility = 'hidden';
	
	document.getElementById('projtema').style.visibility = 'hidden';
	document.getElementById('realtema').style.visibility = 'hidden';
	document.getElementById('udrzbatema').style.visibility = 'hidden';
	document.getElementById('ostatnitema').style.visibility = 'hidden';

	document.getElementById('proj1').style.visibility = 'hidden';
	document.getElementById('proj2').style.visibility = 'hidden';
	document.getElementById('proj3').style.visibility = 'hidden';

	document.getElementById('real1').style.visibility = 'hidden';
	document.getElementById('real2').style.visibility = 'hidden';
	document.getElementById('real3').style.visibility = 'hidden';
	document.getElementById('real4').style.visibility = 'hidden';

	document.getElementById('udrzba1').style.visibility = 'hidden';
	document.getElementById('udrzba2').style.visibility = 'hidden';
	document.getElementById('udrzba3').style.visibility = 'hidden';
	document.getElementById('udrzba4').style.visibility = 'hidden';


	document.getElementById('ostatni1').style.visibility = 'hidden';
	document.getElementById('ostatni2').style.visibility = 'hidden';
	document.getElementById('ostatni3').style.visibility = 'hidden';
	document.getElementById('ostatni4').style.visibility = 'hidden';
		
	if(co == 'projtema') {
		document.getElementById(co).style.visibility = 'visible';
		document.getElementById('proj').style.visibility = 'visible';
		proj_klik = 1;
	}
	if(co == 'realtema') {
		document.getElementById(co).style.visibility = 'visible';
		document.getElementById('real').style.visibility = 'visible';
		real_klik = 1;
	}
	if(co == 'udrzbatema') {
		document.getElementById(co).style.visibility = 'visible';
		document.getElementById('udrzba').style.visibility = 'visible';
		udrzba_klik = 1;
	}
	if(co == 'ostatnitema') {
		document.getElementById(co).style.visibility = 'visible';
		document.getElementById('ostatni').style.visibility = 'visible';
		ostatni_klik = 1;
	}

}

function klik_tema(co) {
	proj1_klik=0;
	proj2_klik=0;
	proj3_klik=0;
	real1_klik=0;
	real2_klik=0;
	real3_klik=0;
	real4_klik=0;
	udrzba1_klik=0;
	udrzba2_klik=0;
	udrzba3_klik=0;
	udrzba4_klik=0;
	ostatni1_klik=0;
	ostatni2_klik=0;
	ostatni3_klik=0;
	ostatni4_klik=0;

	document.getElementById('proj1').style.visibility = 'hidden';
	document.getElementById('proj2').style.visibility = 'hidden';
	document.getElementById('proj3').style.visibility = 'hidden';

	document.getElementById('real1').style.visibility = 'hidden';
	document.getElementById('real2').style.visibility = 'hidden';
	document.getElementById('real3').style.visibility = 'hidden';
	document.getElementById('real4').style.visibility = 'hidden';

	document.getElementById('udrzba1').style.visibility = 'hidden';
	document.getElementById('udrzba2').style.visibility = 'hidden';
	document.getElementById('udrzba3').style.visibility = 'hidden';
	document.getElementById('udrzba4').style.visibility = 'hidden';


	document.getElementById('ostatni1').style.visibility = 'hidden';
	document.getElementById('ostatni2').style.visibility = 'hidden';
	document.getElementById('ostatni3').style.visibility = 'hidden';
	document.getElementById('ostatni4').style.visibility = 'hidden';

	if(co == 'proj1') {
		document.getElementById('proj1').style.visibility = 'visible';
		proj1_klik = 1;
	}
	if(co == 'proj2') {
		document.getElementById('proj2').style.visibility = 'visible';
		proj2_klik = 1;
	}
	if(co == 'proj3') {
		document.getElementById('proj3').style.visibility = 'visible';
		proj3_klik = 1;
	}

	if(co == 'real1') {
		document.getElementById('real1').style.visibility = 'visible';
		real1_klik = 1;
	}
	if(co == 'real2') {
		document.getElementById('real2').style.visibility = 'visible';
		real2_klik = 1;
	}
	if(co == 'real3') {
		document.getElementById('real3').style.visibility = 'visible';
		real3_klik = 1;
	}
	if(co == 'real4') {
		document.getElementById('real4').style.visibility = 'visible';
		real4_klik = 1;
	}

	if(co == 'udrzba1') {
		document.getElementById('udrzba1').style.visibility = 'visible';
		udrzba1_klik = 1;
	}
	if(co == 'udrzba2') {
		document.getElementById('udrzba2').style.visibility = 'visible';
		udrzba2_klik = 1;
	}
	if(co == 'udrzba3') {
		document.getElementById('udrzba3').style.visibility = 'visible';
		udrzba3_klik = 1;
	}
	if(co == 'udrzba4') {
		document.getElementById('udrzba4').style.visibility = 'visible';
		udrzba4_klik = 1;
	}

	if(co == 'ostatni1') {
		document.getElementById('ostatni1').style.visibility = 'visible';
		ostatni1_klik = 1;
	}
	if(co == 'ostatni2') {
		document.getElementById('ostatni2').style.visibility = 'visible';
		ostatni2_klik = 1;
	}
	if(co == 'ostatni3') {
		document.getElementById('ostatni3').style.visibility = 'visible';
		ostatni3_klik = 1;
	}
	if(co == 'ostatni4') {
		document.getElementById('ostatni4').style.visibility = 'visible';
		ostatni4_klik = 1;
	}
	
}

function ukaz (id) {
	document.getElementById(id).style.visibility = 'visible';
}

function schovej (id) {
	if(proj_klik == 0 && id == 'proj') {
		document.getElementById(id).style.visibility = 'hidden';
	}
	if(real_klik == 0 && id == 'real') {
		document.getElementById(id).style.visibility = 'hidden';
	}
	if(udrzba_klik == 0 && id == 'udrzba') {
		document.getElementById(id).style.visibility = 'hidden';
	}
	if(ostatni_klik == 0 && id == 'ostatni') {
		document.getElementById(id).style.visibility = 'hidden';
	}
	if(proj1_klik == 0 && id == 'proj1') {
		document.getElementById(id).style.visibility = 'hidden';
	}
	if(proj2_klik == 0 && id == 'proj2') {
		document.getElementById(id).style.visibility = 'hidden';
	}
	if(proj3_klik == 0 && id == 'proj3') {
		document.getElementById(id).style.visibility = 'hidden';
	}

	if(real1_klik == 0 && id == 'real1') {
		document.getElementById(id).style.visibility = 'hidden';
	}
	if(real2_klik == 0 && id == 'real2') {
		document.getElementById(id).style.visibility = 'hidden';
	}
	if(real3_klik == 0 && id == 'real3') {
		document.getElementById(id).style.visibility = 'hidden';
	}
	if(real4_klik == 0 && id == 'real4') {
		document.getElementById(id).style.visibility = 'hidden';
	}

	if(udrzba1_klik == 0 && id == 'udrzba1') {
		document.getElementById(id).style.visibility = 'hidden';
	}
	if(udrzba2_klik == 0 && id == 'udrzba2') {
		document.getElementById(id).style.visibility = 'hidden';
	}
	if(udrzba3_klik == 0 && id == 'udrzba3') {
		document.getElementById(id).style.visibility = 'hidden';
	}
	if(udrzba4_klik == 0 && id == 'udrzba4') {
		document.getElementById(id).style.visibility = 'hidden';
	}

	if(ostatni1_klik == 0 && id == 'ostatni1') {
		document.getElementById(id).style.visibility = 'hidden';
	}
	if(ostatni2_klik == 0 && id == 'ostatni2') {
		document.getElementById(id).style.visibility = 'hidden';
	}
	if(ostatni3_klik == 0 && id == 'ostatni3') {
		document.getElementById(id).style.visibility = 'hidden';
	}
	if(ostatni4_klik == 0 && id == 'ostatni4') {
		document.getElementById(id).style.visibility = 'hidden';
	}

}