var d = document;

function showPeon(obj, peonNumber) {
	array = d.getElementById('listPeople').getElementsByTagName('li');
	for (var y = 0; y < array.length; y++) {
		array[y].style.fontWeight = '400';
	}
	obj.style.fontWeight = 'bold';
	var divList = d.getElementsByTagName('div');
	for (var i = 0; i < divList.length; i++) { if (divList[i].className == 'people') { divList[i].style.display = 'none'; } }
	d.getElementById(peonNumber).style.display = 'block';
}

window.onload = function() {
	array = d.getElementById('listPeople').getElementsByTagName('li');
	showPeon(array[0], 'peon_1');
}