function showinvest() {
	el = document.getElementById('invest');

	if(el.style.display == "block") {
		el.style.display = "none";
	}
	else {
		el.style.display = "block";
	}
}

function showpitstop() {
	el = document.getElementById('pitstop');

	if(el.style.display == "block") {
		el.style.display = "none";
	}
	else {
		el.style.display = "block";
	}
}

function showpart() {
	el = document.getElementById('part');

	if(el.style.display == "block") {
		el.style.display = "none";
	}
	else {
		el.style.display = "block";
	}
}

function showpolez() {
	el = document.getElementById('polez');

	if(el.style.display == "block") {
		el.style.display = "none";
	}
	else {
		el.style.display = "block";
	}
}

function showpolez2() {
	el = document.getElementById('polez2');

	if(el.style.display == "block") {
		el.style.display = "none";
	}
	else {
		el.style.display = "block";
	}
}

function showuslugi() {
	el = document.getElementById('uslugi');

	if(el.style.display == "block") {
		el.style.display = "none";
	}
	else {
		el.style.display = "block";
	}
}