function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}

function turnSoundOff()
{
	eraseCookie('soundKids');
	createCookie('soundKids', 0, 30);
}

function turnSoundOn()
{
	eraseCookie('soundKids');
	createCookie('soundKids', 1, 30);
}

function getSoundStatus()
{
	value = readCookie('soundKids');
	if (value == null)
	{
		value = 1;
		turnSoundOn()
	}

	if (value == 1)
		return "&som=1";
}


function echeck(str)
{

var error = "Email incorrecto";

	var at="@"
	var dot="."
	var lat=str.indexOf(at)
	var lstr=str.length
	var ldot=str.indexOf(dot)
	if (str.indexOf(at)==-1){
	   alert(error)
	   return false
	}

	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
	   alert(error)
	   return false
	}

	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
	    alert(error)
	    return false
	}

	 if (str.indexOf(at,(lat+1))!=-1){
	    alert(error)
	    return false
	 }

	 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
	    alert(error)
	    return false
	 }

	 if (str.indexOf(dot,(lat+2))==-1){
	    alert(error)
	    return false
	 }

	 if (str.indexOf(" ")!=-1){
	    alert(error)
	    return false
	 }

	 return true
}