function disablePlay() {
	if ((playbtn = document.getElementById('playbtn')) != null) {
		playbtn.disabled=true;
	}
	//if ((downloadbtn = document.getElementById('downloadbtn')) != null) {
	//	downloadbtn.disabled=true; 
	//}
}

function changePlayMsg() {

	var play_msg = document.getElementById("play_msg_id");

	if ( play_msg != null) {
		play_msg.innerHTML="Please wait while signal is synthesized...";
	}
}

function insertExampleText(theText) {
	var input_text_box = document.getElementById("input_text_box_id");

	var finalText = theText.replace(/<br>/gi, '\n');

	if ( input_text_box != null) {
		input_text_box.innerHTML=finalText;
	}

}

function resetInputText() {
	var input_text_box = document.getElementById("input_text_box_id");
	if ( input_text_box != null) {
		input_text_box.innerHTML="";
	}
}

function saveTextFromInputField() {
	var input_text_box = document.getElementById("input_text_box_id");
	var input_text_lang = document.getElementById("input_text_lang");
	
	input_text_lang.value = input_text_box.innerHTML;
	// document.write("Input text is " + input_text_lang.value);
}

function setActionField(cmd) {
	var field = document.getElementById("actionField");
	field.value = cmd; 
}