// isEmail (STRING s)
// 
// Email address must be of form a@b.c ... in other words:
// * there must be at least one character before the @
// * there must be at least one character before and after the .
// * the characters @ and . are both required
// * there must be no spaces in the email address
//

function isEmail (s)
{
	if (isEmpty(s)) return false;
   
    // is s whitespace?
    if (isWhitespace(s)) return false;
    
    // make sure the email contains no spaces
    if(s.indexOf(' ') >= 0) return false;
    
    // there must be >= 1 character before @, so we
    // start looking at character position 1 
    // (i.e. second character)
    var sLength = s.length;
	var atpos=s.indexOf("@");
	var dotpos=s.lastIndexOf(".");
	
	// look for @
    if (atpos<1) return false

    // look for . after @
    if (dotpos<atpos+2) return false

    // there must be at least one character after the .
    if (dotpos+2>=sLength ) return false;
    

    else return true;
}

// Check whether string s is empty.
function isEmpty(s)
{   
	return ((s == null) || (s.length == 0));
}


// whitespace characters
var whitespace = " \t\n\r";

// Returns true if string s is empty or 
// whitespace characters only.
function isWhitespace (s)
{   
	var i;

    // Is s empty?
    if (isEmpty(s)) return true;

    // Search through string's characters one by one
    // until we find a non-whitespace character.
    // When we do, return false; if we don't, return true.

    for (i = 0; i < s.length; i++)
    {   
		// Check that current character isn't whitespace.
		var c = s.charAt(i);
	
		if (whitespace.indexOf(c) == -1) return false;
    }

    // All characters are whitespace.
    return true;
}

var numeric = "1234567890-."
function isNumeric (s)
{
    for (i = 0; i < s.length; i++)
    {   
		// Check that current character is numeric.
		var c = s.charAt(i);
	
		if (numeric.indexOf(c) == -1) return false;
    }
	return true;
}

function cal1DateBeforeCal2Date(calendarOneField, calendarTwoField)
{
	var publishDateValue=calendarOneField.value;
	//alert('publishDate:'+publishDateValue);
	publishArray=publishDateValue.split("/");
	//alert(publishArray[0] +'/'+ publishArray[1] +'/'+ publishArray[2]);
	var publishDate=new Date();
	publishDate.setYear(publishArray[2]);
	publishDate.setMonth(publishArray[1]-1);
	publishDate.setDate(publishArray[0]);
	//alert(publishDate);
	
	var expireDateValue=calendarTwoField.value;	
	expireArray=expireDateValue.split("/");
	var expireDate=new Date();
	expireDate.setYear(expireArray[2]);
	expireDate.setMonth(expireArray[1]-1);
	expireDate.setDate(expireArray[0]);
	//alert(expireDate);
	
	if(expireDate.getTime() < publishDate.getTime())
	{
		return false;	
	}
	else
	{
		return true;
	}
}	


function getSelectedCheckbox(buttonGroup) {
   // Go through all the check boxes. return an array of all the ones
   // that are selected (their position numbers). if no boxes were checked,
   // returned array will be empty (length will be zero)
   var retArr = new Array();
   var lastElement = 0;
   if (buttonGroup[0]) { // if the button group is an array (one check box is not an array)
      for (var i=0; i<buttonGroup.length; i++) {
         if (buttonGroup[i].checked) {
            retArr.length = lastElement;
            retArr[lastElement] = i;
            lastElement++;
         }
      }
   } else { // There is only one check box (it's not an array)
      if (buttonGroup.checked) { // if the one check box is checked
         retArr.length = lastElement;
         retArr[lastElement] = 0; // return zero as the only array value
      }
   }
   return retArr;
} // Ends the "getSelectedCheckbox" function


function isDate(dd,mm,yyyy) {
  var d = new Date(mm + "/" + dd + "/" + yyyy);
  return d.getMonth() + 1 == mm && d.getDate() == dd && d.getFullYear() == yyyy;
}

function arrayFind(theArray, theString)
{
  for (var i=0; i<theArray.length; i++)
  {
    if (theArray[i].toUpperCase() == theString.toUpperCase()) 
    {
      return i;
    }
  }
  return -1;
}
function getSelectedValue(theSelect) {
	
	return (theSelect.options[theSelect.selectedIndex].value)
}

function getSelectedRadio(buttonGroup) {
   // returns the array number of the selected radio button or -1 if no button is selected
   if (buttonGroup[0]) { // if the button group is an array (one button is not an array)
      for (var i=0; i<buttonGroup.length; i++) {
         if (buttonGroup[i].checked) {
            return i
         }
      }
   } else {
      if (buttonGroup.checked) { return 0; } // if the one button is checked, return zero
   }
   // if we get to this point, no radio button is selected
   return -1;
} // Ends the "getSelectedRadio" function

function getSelectedRadioValue(buttonGroup) {
   // returns the value of the selected radio button or "" if no button is selected
   var i = getSelectedRadio(buttonGroup);
   if (i == -1) {
      return "";
   } else {
      if (buttonGroup[i]) { // Make sure the button group is an array (not just one button)
         return buttonGroup[i].value;
      } else { // The button group is just the one button, and it is checked
         return buttonGroup.value;
      }
   }
} // Ends the "getSelectedRadioValue" function


function GetFCKLength(instance){
	//alert(instance);
	// This functions shows that you can interact directly with the editor area
	// DOM. In this way you have the freedom to do anything you want with it.

	// Get the editor instance that we want to interact with.
	var oEditor = FCKeditorAPI.GetInstance(instance) ;
	// Get the Editor Area DOM (Document object).
	var oDOM = oEditor.EditorDocument ;
	var iLength ;

	// The are two diffent ways to get the text (without HTML markups).
	// It is browser specific.
	if ( document.all )		// If Internet Explorer.
	{
		iLength = oDOM.body.innerText.length ;
	}
	else					// If Gecko.
	{
		var r = oDOM.createRange() ;
		r.selectNodeContents( oDOM.body ) ;
		iLength = r.toString().length ;
	}
	return iLength;
	//alert( 'Actual text length (without HTML markups): ' + iLength + ' characters' ) ;
}