function validateContactUs()
{
	if(isBlank(document.getElementById('txtName').value))
	{
		alert("Please enter your Name.");
		document.getElementById('txtName').focus();
		return false;		
	}	
	if(!checkEmailAddress(document.getElementById('txtEmail').value))
	{
		alert("Please enter a valid email address.");
		document.getElementById('txtEmail').focus();
		return false;		
	}	
	if(isBlank(document.getElementById('taMessage').value))
	{
		alert("Please enter your comment.");
		document.getElementById('taMessage').focus();
		return false;		
	}	

	if (document.getElementById('rdbReplyBackPhone').checked)
	{
		if(isBlank(document.getElementById('txtPhone').value))
		{
			alert("You have choosen to be replied via phone, please enter your phone number.");
			document.getElementById('txtPhone').focus();
			return false;		
		}
	}
	return true;
}