var lfStart = false;
var lfTimer;
var lfFlag = false;

function je_switch(lang, f) {
	
	var je_visi;
	var je_hide;
	
	if (f==undefined && lfStart) {
		clearInterval(lfTimer);
		lfStart = false;
	}
	
	if (lang=="j" || lang=="J") {
		je_visi="j";
		je_hide="e";
	} else {
		je_visi="e";
		je_hide="j";
	}
	
	for (var i=0; i < document.getElementsByTagName("span").length; i++) {
		var je_span = document.getElementsByTagName("span").item(i);
		 if (je_span.id == je_visi) {
		 	je_span.style.visibility = "visible";
		} else if (je_span.id == je_hide) {
			je_span.style.visibility = "hidden";
		}
	}
}

function langFlickerStart() {
	if (lfStart) {
		clearInterval(lfTimer);
		lfStart = false;
	} else {
		lfTimer = setInterval('lflicker()',100);
		lfStart = true;
	}
}

function lflicker() {
	if (lfFlag) {
		je_switch('e',true);
		lfFlag = false;
	} else {
		je_switch('j',true);
		lfFlag = true;
	}
	
}