var sDate = '';
var ChosenDate = new Date;
var today = new Date;


function jsOpenCalendar(args)
{
  var strPageAddress = 'http://www.inmanswebstore.co.uk/Webstore/include/Calendar/Calendar.asp';
  
  var strWindowName = 'DateSelector';
  
  var intWidth = 200;
  var intHeight = 180;

  if (isIE == true) 
    intWidth = 160, intHeight = 180;
  else if (isFirefox == true) 
    if (isWindows == true)
      intWidth = 215, intHeight = 180;
    else intWidth = 260, intHeight = 180;
  else if (isSafari == true) 
    intWidth = 260, intHeight = 180;
  else if (isNN == true) 
    intWidth = 200, intHeight = 180;
    
  var intLeftPosition = (screen.width) ? (screen.width - intWidth) / 2 : 0;
  var intTopPosition = (screen.height) ? (screen.height - intHeight) / 2 : 0;
  
	var sfeatures;
	sfeatures =  'width=' + intWidth + ',';
	sfeatures += 'height=' + intHeight + ',';
	sfeatures += 'left=' + intLeftPosition + ',';
	sfeatures += 'top=' + intTopPosition + ',';
	sfeatures += 'toolbar=no,';
	sfeatures += 'location=no,';
	sfeatures += 'menubar=no,';
	sfeatures += 'resizable=no,';
	sfeatures += 'status=no,';
	sfeatures += 'scrollbars=no';
	
	alert("sfeatures=" + sfeatures);
	
	var win = window.open(strPageAddress + args, strWindowName, sfeatures);
	win.focus();
	win.opener = window.self;
}



function jsCalendarUpdate()
{	
	document.getElementById(DateFieldId).value = sDate;
}


 
function CheckDate(CONTROL, past)
{ 
  var strFormat = 'dd/mm/yyyy';
  if (CONTROL.value.length == 0)
    return true;
  if (!isDate(CONTROL.value))
  { 
    alert("Date is not valid or is incorrect format") 
    CONTROL.value = '';
    return false; 
  }

  if (past == 'false')
  {
    if (ChosenDate < today)
    {
      alert("Please enter a date which is in the future") 
      CONTROL.value = '';
      return false; 
    }
  }
  
  CONTROL.value = FormatDate(CONTROL.value)
  
  return true;
} 



function isDate(DateToCheck)
{
  if (DateToCheck=="")
  {
    return true;
  }

  var m_strDate = FormatDate(DateToCheck);
  
  if (m_strDate == "")
  {
    return false;
  }
  var m_arrDate = m_strDate.split("/");
  var m_DAY = m_arrDate[0];
  var m_MONTH = m_arrDate[1];
  var m_YEAR = m_arrDate[2];
  if (m_YEAR.length > 4)
  {
    return false;
  }
  m_strDate = m_MONTH + "/" + m_DAY + "/" + m_YEAR;
  ChosenDate.setDate(m_DAY);
  ChosenDate.setMonth(m_MONTH - 1);
  ChosenDate.setFullYear(m_YEAR);
  var testDate=new Date(m_strDate);
  
  if (testDate.getMonth() + 1 == m_MONTH)
  {
    return true;
  } 
  else
  {
    return false;
  }
}




function FormatDate(DateToFormat,FormatAs)
{
  if (DateToFormat == "")
  {
    return "";
  }
  
  if (!FormatAs)
    FormatAs="dd/mm/yyyy";

  var strReturnDate;
  FormatAs = FormatAs.toLowerCase();
  DateToFormat = DateToFormat.toLowerCase();
  var arrDate
  var arrMonths = new Array("January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December");
  var strMONTH;
  var Separator;

  while(DateToFormat.indexOf("st") >- 1)
  {
    DateToFormat = DateToFormat.replace("st", "");
  }

  while(DateToFormat.indexOf("nd") >- 1)
  {
    DateToFormat = DateToFormat.replace("nd", "");
  }

  while(DateToFormat.indexOf("rd") >- 1)
  {
    DateToFormat = DateToFormat.replace("rd", "");
  }

  while(DateToFormat.indexOf("th") >- 1)
  {
    DateToFormat = DateToFormat.replace("th", "");
  }

  if(DateToFormat.indexOf(".") >- 1){
  Separator = ".";
  }

  if(DateToFormat.indexOf("-") >- 1)
  {
    Separator = "-";
  }


  if(DateToFormat.indexOf("/") >- 1)
  {
    Separator = "/";
  }

  if(DateToFormat.indexOf(" ") >- 1)
  {
    Separator = " ";
  }

  arrDate = DateToFormat.split(Separator);
  DateToFormat = "";
  for(var iSD = 0;iSD < arrDate.length;iSD++)
  {
  	if(arrDate[iSD]!="")
  	{
  		DateToFormat += arrDate[iSD] + Separator;
  	}
  }
  DateToFormat = DateToFormat.substring(0,DateToFormat.length-1);
  arrDate = DateToFormat.split(Separator);

  if (arrDate.length < 3)
  {
    return "";
  }

  var DAY = arrDate[0];
  var MONTH = arrDate[1];
  var YEAR = arrDate[2];

  if(parseFloat(arrDate[1]) > 12)
  {
    DAY = arrDate[1];
    MONTH = arrDate[0];
  }

  if(parseFloat(DAY) && DAY.toString().length==4)
  {
    YEAR = arrDate[0];
    DAY = arrDate[2];
    MONTH = arrDate[1];
  }

  for(var iSD = 0;iSD < arrMonths.length;iSD++)
  {
    var ShortMonth = arrMonths[iSD].substring(0,3).toLowerCase();
    var MonthPosition = DateToFormat.indexOf(ShortMonth);
  	if (MonthPosition > -1)
  	{
  	  MONTH = iSD + 1;
  		if(MonthPosition == 0)
  		{
  		  DAY = arrDate[1];
  		  YEAR = arrDate[2];
  		}
  	break;
  	}
  }

  var strTemp = YEAR.toString();
  if(strTemp.length==2)
  {
  	if(parseFloat(YEAR)>40)
  	{
    	YEAR = "19" + YEAR;
  	}
  	else{
  	  YEAR = "20" + YEAR;
  	}
  }

	if (parseInt(MONTH)< 10 && MONTH.toString().length < 2)
	{
	  MONTH = "0" + MONTH;
	}
	if (parseInt(DAY)< 10 && DAY.toString().length < 2)
	{
	  DAY = "0" + DAY;
	}
	switch (FormatAs)
	{
	  case "dd/mm/yyyy":
	    return DAY + "/" + MONTH + "/" + YEAR;
	  case "mm/dd/yyyy":
	    return MONTH + "/" + DAY + "/" + YEAR;
	  case "dd/mmm/yyyy":
	    return DAY + " " + arrMonths[MONTH -1].substring(0,3) + " " + YEAR;
	  case "mmm/dd/yyyy":
	    return arrMonths[MONTH -1].substring(0,3) + " " + DAY + " " + YEAR;
	  case "dd/mmmm/yyyy":
	    return DAY + " " + arrMonths[MONTH -1] + " " + YEAR;	
	  case "mmmm/dd/yyyy":
	    return arrMonths[MONTH -1] + " " + DAY + " " + YEAR;
	}

  return DAY + "/" + strMONTH + "/" + YEAR;;

}