/*
  $Id: general.js,v 1.3 2003/02/10 22:30:55 hpdl Exp $

  osCommerce, Open Source E-Commerce Solutions
  http://www.oscommerce.com

  Copyright (c) 2003 osCommerce

  Released under the GNU General Public License
*/

function SetFocus(TargetFormName) {
  var target = 0;
  if (TargetFormName != "") {
    for (i=0; i<document.forms.length; i++) {
      if (document.forms[i].name == TargetFormName) {
        target = i;
        break;
      }
    }
  }

  var TargetForm = document.forms[target];
    
  for (i=0; i<TargetForm.length; i++) {
    if ( (TargetForm.elements[i].type != "image") && (TargetForm.elements[i].type != "hidden") && (TargetForm.elements[i].type != "reset") && (TargetForm.elements[i].type != "submit") ) {
      TargetForm.elements[i].focus();

      if ( (TargetForm.elements[i].type == "text") || (TargetForm.elements[i].type == "password") ) {
        TargetForm.elements[i].select();
      }

      break;
    }
  }
}

function RemoveFormatString(TargetElement, FormatString) {
  if (TargetElement.value == FormatString) {
    TargetElement.value = "";
  }

  TargetElement.select();
}

function CheckDateRange(from, to) {
  if (Date.parse(from.value) <= Date.parse(to.value)) {
    return true;
  } else {
    return false;
  }
}

function IsValidDate(DateToCheck, FormatString) {
  var strDateToCheck;
  var strDateToCheckArray;
  var strFormatArray;
  var strFormatString;
  var strDay;
  var strMonth;
  var strYear;
  var intday;
  var intMonth;
  var intYear;
  var intDateSeparatorIdx = -1;
  var intFormatSeparatorIdx = -1;
  var strSeparatorArray = new Array("-"," ","/",".");
  var strMonthArray = new Array("jan","feb","mar","apr","may","jun","jul","aug","sep","oct","nov","dec");
  var intDaysArray = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);

  strDateToCheck = DateToCheck.toLowerCase();
  strFormatString = FormatString.toLowerCase();
  
  if (strDateToCheck.length != strFormatString.length) {
    return false;
  }

  for (i=0; i<strSeparatorArray.length; i++) {
    if (strFormatString.indexOf(strSeparatorArray[i]) != -1) {
      intFormatSeparatorIdx = i;
      break;
    }
  }

  for (i=0; i<strSeparatorArray.length; i++) {
    if (strDateToCheck.indexOf(strSeparatorArray[i]) != -1) {
      intDateSeparatorIdx = i;
      break;
    }
  }

  if (intDateSeparatorIdx != intFormatSeparatorIdx) {
    return false;
  }

  if (intDateSeparatorIdx != -1) {
    strFormatArray = strFormatString.split(strSeparatorArray[intFormatSeparatorIdx]);
    if (strFormatArray.length != 3) {
      return false;
    }

    strDateToCheckArray = strDateToCheck.split(strSeparatorArray[intDateSeparatorIdx]);
    if (strDateToCheckArray.length != 3) {
      return false;
    }

    for (i=0; i<strFormatArray.length; i++) {
      if (strFormatArray[i] == 'mm' || strFormatArray[i] == 'mmm') {
        strMonth = strDateToCheckArray[i];
      }

      if (strFormatArray[i] == 'dd') {
        strDay = strDateToCheckArray[i];
      }

      if (strFormatArray[i] == 'yyyy') {
        strYear = strDateToCheckArray[i];
      }
    }
  } else {
    if (FormatString.length > 7) {
      if (strFormatString.indexOf('mmm') == -1) {
        strMonth = strDateToCheck.substring(strFormatString.indexOf('mm'), 2);
      } else {
        strMonth = strDateToCheck.substring(strFormatString.indexOf('mmm'), 3);
      }

      strDay = strDateToCheck.substring(strFormatString.indexOf('dd'), 2);
      strYear = strDateToCheck.substring(strFormatString.indexOf('yyyy'), 2);
    } else {
      return false;
    }
  }

  if (strYear.length != 4) {
    return false;
  }

  intday = parseInt(strDay, 10);
  if (isNaN(intday)) {
    return false;
  }
  if (intday < 1) {
    return false;
  }

  intMonth = parseInt(strMonth, 10);
  if (isNaN(intMonth)) {
    for (i=0; i<strMonthArray.length; i++) {
      if (strMonth == strMonthArray[i]) {
        intMonth = i+1;
        break;
      }
    }
    if (isNaN(intMonth)) {
      return false;
    }
  }
  if (intMonth > 12 || intMonth < 1) {
    return false;
  }

  intYear = parseInt(strYear, 10);
  if (isNaN(intYear)) {
    return false;
  }
  if (IsLeapYear(intYear) == true) {
    intDaysArray[1] = 29;
  }

  if (intday > intDaysArray[intMonth - 1]) {
    return false;
  }
  
  return true;
}

function IsLeapYear(intYear) {
  if (intYear % 100 == 0) {
    if (intYear % 400 == 0) {
      return true;
    }
  } else {
    if ((intYear % 4) == 0) {
      return true;
    }
  }

  return false;
}

function openPopup(windowname, URL, sw, sh) 
{
	popWindow = window.open(URL, windowname, "scrollbars=auto, status=yes, resizable=yes, width=" + sw + ", height=" + sh);
}

function IsDigitStr(str)
{
	if(str.length==0)
		return false;
	for(i=0;i<str.length;i++)
		if(str.charAt(i)<"0" || str.charAt(i)>"9")
			return false;
	return true;
}

function CheckEmailAddress(InputString)
{
	var Counter=0;
	InputString=Trim(InputString);
	if(InputString.length==0)
		return false;

	Temp=InputString.charAt(Counter);
	while ((IsLetterOrDigit(Temp)) || (Temp=='-') || (Temp=='_') || (Temp=='.'))
	{
		Counter++;
		if(Counter>=InputString.length)
			return false;
		else
			Temp=InputString.charAt(Counter);
	}
	
	if(Temp=='@')
	{
		Counter++;
		if(Counter>=InputString.length)
			return false;
		Temp=InputString.charAt(Counter);
		while ((IsLetterOrDigit(Temp)) || (Temp=='-') || (Temp=='_'))
		{
			Counter++;
			if(Counter>=InputString.length)
				return false;
			else
				Temp=InputString.charAt(Counter);
		}
		if(Temp=='.')
		{
			if(InputString.charAt(Counter-1)=='@')
				return false;
			Counter++;
			if(Counter>=InputString.length)
				return false;
			Temp=InputString.charAt(Counter);
			while ((IsLetterOrDigit(Temp)) || (Temp=='-') || (Temp=='_'))
			{
				Counter++;
				if(Counter<=InputString.length)
					return true;
				else
					return false;
			}
		}
		else
			return false;
	}
	else
		return false;
	return false;
}

// this function remove all spaces in the left of string
function LTrim(st)
{
	var i=0;
	var st2="";
	while(i<=st.length && st.charAt(i)==" ") i++;
	while(i<=st.length)
	{
		st2=st2+st.charAt(i);
		i++;
	}
	return st2;
}

// this function remove all spaces in the right of string
function RTrim(st)
{
	var i=st.length-1;
	var st2="";
	while(i>-1 && st.charAt(i)==" ") i--;
	if(i<0) return "";
	for(j=0;j<=i;j++)
		st2=st2+st.charAt(j);
	return st2;
}

// this function remove spaces in the left and in the right of string
function Trim(st)
{
	st = RTrim(st);
	st = LTrim(st);
	return st;
}

function DoSearch()
{
	CardName = Trim(document.SearchForm.CardName.value);
	if (CardName != "")
		document.SearchForm.submit();
}
	
function IsLetterOrDigit(st)
{
	if(IsDigitStr(st)) 
		return true;
	if((st>="a" && st<="z") || (st>="A" && st<="Z"))
		return true;
	return false;
}