function system_active( id ) {
var e = document.getElementById( id );
if( e ) e.style.display = 'block';
}

function system_inactive( id ) {
var e = document.getElementById( id );
if( e ) e.style.display = 'none';
}


function greenBorder(element){
	element.style.border = "2px solid #67b92c";
}

function noBorder(element){
	element.style.border = "2px solid #fff";
}

function showContent(element) { 
	document.getElementById("1").style.display = "none";
	document.getElementById("2").style.display = "none";
	document.getElementById("3").style.display = "none";
	document.getElementById("4").style.display = "none";

	if (element.className == "open") { 
	  document.getElementById( element.id.substring(1) ).style.display = "none"; 
	  element.className = "close"; 
	} else {
		element.className = "open"; 
		document.getElementById( element.id.substring(1) ).style.display = "block";
	}
}