/**
 * Check if the access code is empty
 */
function checkAccesscodeValue()
{
	var form = document.forms[0];

	var access_code = form.accesscode.value;

	//trim spaces
	access_code = access_code.replace(/^\s+|\s+$/g, '');

	if(access_code=="")
	{
		alert("access code can not be empty");
		return false;
	}
	else
	{
		form.submit();
	}
}