// JavaScript Document
function isValidEmail(str) {
   //return (str.indexOf(".") > 2) && (str.indexOf("@") > 0);
   var emailRegEx = /^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i;
     if (str.search(emailRegEx) == -1) {
         return false;
     } else {
         return true;
     }
}
function clearInputTextCustom(thefield, defValue){
	if (defValue==thefield.value){
		thefield.value = "";
	}
} 
function canPlayAudioMP3(){
	try {
		var audio = new Audio();
		//Shortcut which doesn't work in Chrome (always returns ""); pass through
		// if "maybe" to do asynchronous check by loading MP3 data: URI
		if(audio.canPlayType('audio/mpeg') == "probably"){
			return true;
        }
		//If this event fires, then MP3s can be played
		audio.addEventListener('canplaythrough', function(e){
			return true;
		}, false);

		//If this is fired, then client can't play MP3s
		audio.addEventListener('error', function(e){
			return false;
		}, false);

		//Smallest base64-encoded MP3 I could come up with (<0.000001 seconds long)
		audio.src = "data:audio/mpeg;base64,/+MYxAAAAANIAAAAAExBTUUzLjk4LjIAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
		audio.load();
	}
	catch(e){
		return false;
	}
}
function getInternetExplorerVersion() {
    var rv = -1; // Return value assumes failure.
    if (navigator.appName == 'Microsoft Internet Explorer') {
        var ua = navigator.userAgent;
        var re = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
        if (re.exec(ua) != null)
            rv = parseFloat(RegExp.$1);
    }
    return rv;
}