function validateETNo(etno)
{
	var pattern = /^(324){1}[-]{0,1}[0-9]{10}$/;
	if(!pattern.test(etno))
  	{
  		alert("Wrong E-Ticket No. or not E-Ticket of Shandong Airline!")
  		return false;
  	}
	return true;
}

function validateinvoiceNo(invno)
{
	var pattern = /^[0-9]{10}$/;
	 
  	if(!pattern.test(invno))
  	{
  		alert("Wrong E-Ticket Receipt No.!")
  		return false;
  	}
	return true;
}

function validaterand(rand)
{
	var pattern = /^[0-9]{4}$/;
	 
  	if(!pattern.test(rand))
  	{
  		alert("Please input password for 4 numbers!")
  		return false;
  	}
	return true;
}