// common util functions

function chinesesavvy_appendDiv(_divId, _html) {
	var _utilDiv = null;
	var _number = Math.random();
	_utilDiv = document.createElement("div");
	_utilDiv.setAttribute("id", _divId);
	_utilDiv.setAttribute("style", "display:none");
	_utilDiv.innerHTML = _html;
	document.getElementsByTagName("body").item(0).appendChild(_utilDiv);
	return false;
}


// play voice
function savvy_playVoice(_voiceUrl){
	if(document.getElementById("_savvy_voice_zone")==null){
		chinesesavvy_appendDiv("_savvy_voice_zone","");
	}
	var _voiceZone = document.getElementById("_savvy_voice_zone");
	_voiceZone.innerHTML = "<embed autostart=\"true\" loop=\"false\" controls=\"ControlPanel\" width=\"0\" height=\"0\" src=\""+_voiceUrl+"\">";
	return false;
}

// get url's file name
function savvy_getFileName(_url){
	var _idx = _url.lastIndexOf("/");
	if(_idx!=-1){
		return _url.substring(_idx+1);
	}
	return _url;
}