function overtab1() {
	z = 1;
	document.getElementById('mnu1').style.visibility = 'hidden';
	document.getElementById('line1').style.visibility = 'hidden';
	document.getElementById('mnu2').style.visibility = 'visible';
	document.getElementById('mnu3').style.visibility = 'visible';
	document.getElementById('mnu4').style.visibility = 'visible';
	document.getElementById('mnu5').style.visibility = 'visible';
	document.getElementById('mnu6').style.visibility = 'visible';
	document.getElementById('line2').style.visibility = 'visible';
	document.getElementById('line3').style.visibility = 'visible';
	document.getElementById('line4').style.visibility = 'visible';
	document.getElementById('line5').style.visibility = 'visible';

}
function overtab2() {
	z = 2;
	document.getElementById('mnu2').style.visibility = 'hidden';
	document.getElementById('line1').style.visibility = 'hidden';
	document.getElementById('line2').style.visibility = 'hidden';
	document.getElementById('mnu1').style.visibility = 'visible';
	document.getElementById('mnu3').style.visibility = 'visible';
	document.getElementById('mnu4').style.visibility = 'visible';
	document.getElementById('mnu5').style.visibility = 'visible';
	document.getElementById('mnu6').style.visibility = 'visible';
	document.getElementById('line3').style.visibility = 'visible';
	document.getElementById('line4').style.visibility = 'visible';
	document.getElementById('line5').style.visibility = 'visible';
}
function overtab3() {
	z = 3;
	document.getElementById('mnu3').style.visibility = 'hidden';
	document.getElementById('line2').style.visibility = 'hidden';
	document.getElementById('line3').style.visibility = 'hidden';
	document.getElementById('mnu1').style.visibility = 'visible';
	document.getElementById('mnu2').style.visibility = 'visible';
	document.getElementById('mnu4').style.visibility = 'visible';
	document.getElementById('mnu5').style.visibility = 'visible';
	document.getElementById('mnu6').style.visibility = 'visible';
	document.getElementById('line1').style.visibility = 'visible';
	document.getElementById('line4').style.visibility = 'visible';
	document.getElementById('line5').style.visibility = 'visible';
}
function overtab4() {
	z = 4;
	document.getElementById('mnu4').style.visibility = 'hidden';
	document.getElementById('line3').style.visibility = 'hidden';
	document.getElementById('line4').style.visibility = 'hidden';
	document.getElementById('mnu1').style.visibility = 'visible';
	document.getElementById('mnu3').style.visibility = 'visible';
	document.getElementById('mnu2').style.visibility = 'visible';
	document.getElementById('mnu5').style.visibility = 'visible';
	document.getElementById('mnu6').style.visibility = 'visible';
	document.getElementById('line1').style.visibility = 'visible';
	document.getElementById('line2').style.visibility = 'visible';
	document.getElementById('line5').style.visibility = 'visible';
}
function overtab5() {
	z = 5;
	document.getElementById('mnu5').style.visibility = 'hidden';
	document.getElementById('line4').style.visibility = 'hidden';
	document.getElementById('line5').style.visibility = 'hidden';
	document.getElementById('mnu1').style.visibility = 'visible';
	document.getElementById('mnu3').style.visibility = 'visible';
	document.getElementById('mnu2').style.visibility = 'visible';
	document.getElementById('mnu4').style.visibility = 'visible';
	document.getElementById('mnu6').style.visibility = 'visible';
	document.getElementById('line1').style.visibility = 'visible';
	document.getElementById('line2').style.visibility = 'visible';
	document.getElementById('line3').style.visibility = 'visible';
}
function overtab6() {
	z = 6;
	document.getElementById('mnu6').style.visibility = 'hidden';
	document.getElementById('line5').style.visibility = 'hidden';
	document.getElementById('mnu1').style.visibility = 'visible';
	document.getElementById('mnu3').style.visibility = 'visible';
	document.getElementById('mnu2').style.visibility = 'visible';
	document.getElementById('mnu4').style.visibility = 'visible';
	document.getElementById('mnu5').style.visibility = 'visible';
	document.getElementById('line1').style.visibility = 'visible';
	document.getElementById('line2').style.visibility = 'visible';
	document.getElementById('line3').style.visibility = 'visible';
	document.getElementById('line4').style.visibility = 'visible';
}