function changeBodyGuide(){
	turnBuyersOff();
	document.getElementById('guide').setAttribute("class", "active");
	document.getElementById('content-details-guide').style.display = 'block';
}
function changeBodyStamp() {
	turnBuyersOff();
	document.getElementById('stamp').setAttribute("class", "active");
	document.getElementById('content-details-stamp').style.display = 'block';	
} 

function changeBodyCost(){
	turnBuyersOff();
	document.getElementById('cost').setAttribute("class", "active");
	document.getElementById('content-details-cost').style.display = 'block';
}
function changeBodyQuestions(){
	turnBuyersOff();
	document.getElementById('questions').setAttribute("class", "active");
	document.getElementById('content-details-questions').style.display = 'block';	
}
function turnBuyersOff() {
	document.getElementById('guide').setAttribute("class", "not-active");
	document.getElementById('stamp').setAttribute("class", "not-active");
	document.getElementById('cost').setAttribute("class", "not-active");
	document.getElementById('questions').setAttribute("class", "not-active");
	document.getElementById('content-details').style.display = 'none';
	document.getElementById('content-details-guide').style.display = 'none';
	document.getElementById('content-details-stamp').style.display = 'none';
	document.getElementById('content-details-cost').style.display = 'none';
	document.getElementById('content-details-questions').style.display = 'none';
}