function ValidateData()
{
	var element = document.getElementById('contactDate');
	if (element.value != "")
	{
		return false;
	}
	
	var element = document.getElementById('txtEmail');
	if (element.value == "")
	{
		alert('Please, enter your email.');
		element.focus();
		return false;
	}
	else
	{
		if(!ValidateEmail(element.value))
		{
			alert("Please check the emails address");
			element.focus();
			return false;
		}
	}
	
	var element = document.getElementById('txtFirstName');
	if (element.value == "")
	{
		alert('Please, enter your first name.');
		element.focus();
		return false;
	}
	
	var element = document.getElementById('txtLastName');
	if (element.value == "")
	{
		alert('Please, enter your last name.');
		element.focus();
		return false;
	}

	
	
	var element = document.getElementById('txtPhone');
	if (element.value == "")
	{
		alert('Please, enter your phone.');
		element.focus();
		return false;
	}
	else
	{
		if(!ValidatePhone(element.value))
		{
			alert("Please, enter a valid phone number.");
			element.focus();
			return false;
		}
	}

	var element = document.getElementById('txtComments');
	if (element.value == "")
	{
		alert('Please, enter your comments.');
		element.focus();
		return false;
	}
}

function ValidateEmail(valor) 
{
    if (/\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*/.test(valor))
	    return true;
    else
	    return false;
}

function ValidatePhone(incoming)
{
	var ValidChars = "0123456789.()- ";
	var IsCorrect=true;
	var Char;

	for (cont = 0; cont < incoming.length && IsCorrect == true; cont++) 
	{ 
		Char = incoming.charAt(cont); 
		if (ValidChars.indexOf(Char) == -1) 
			return false;
	}
	return true;
}