function OnClick(id)
{
	if (document.getElementById(id).style.display == 'none')
	{
		document.getElementById(id).style.display = 'block';
	}
	else
	{
		document.getElementById('Calendar1').style.display = 'none';
	}
	return false;
}

function enableSignup()
{
	if (document.getElementById("ctl00_ContentPlaceHolder1_butSignUp").style.display == 'none')
	{
		document.getElementById("ctl00_ContentPlaceHolder1_butSignUp").style.display = 'block';
	}
	else
	{
		document.getElementById("ctl00_ContentPlaceHolder1_butSignUp").style.display = 'none';
	}
} 

function validateDate(sender,args)
{
	var maxDate = new Date();
	var today = new Date();
	maxDate.setMonth(maxDate.getMonth() + 1);
	
	if (sender._selectedDate > maxDate)
	{
	    alert("You cannot select a day greater than one month from today!");
		sender._selectedDate = new Date();
		sender._textbox.set_Value("")
	}

	else if (sender._selectedDate.format("dd/MM/yyyy") < today.format("dd/MM/yyyy"))
	{
		alert("You cannot select a day earlier than today!");
		sender._selectedDate = new Date();
		sender._textbox.set_Value("")
	}
}