var aboutShowed = false;
var c;

function showAbout(){
 if (!aboutShowed) {
  c = document.getElementById('about_company');
  c.style.display = 'block';
 }
 aboutShowed = true;

}

function hideAbout(){
 clearInterval(c.timer);
 if (!aboutShowed) {
	  c.style.display = 'none'; 
 }
}

function prepareToHide(){
	c.timer = setInterval(hideAbout,1000);
	aboutShowed = false;
}