// JavaScript Document

// Expand/Shrink paragraphs
	function showHide(textid,labelid) {
		if (document.getElementById(textid).className == "show") {
	
			document.getElementById(textid).className = "hide";
			document.getElementById(labelid).className = "plus";
			
		} else {
			
			document.getElementById(textid).className = "show";
			document.getElementById(labelid).className = "minus";
		}
	
	}
// Popup functions
	function newWindow(url, name, w, h) {
		window.open(url,name,'scrollbars,resizable,height='+h+',width='+w);
	}
	
	
	function newWindowAll(url, name) {
		window.open(url,name,'location,titlebar,toolbar,menubar,status,scrollbars,resizable');
	}

/******************************************************************************************************************/
/* FORM VALIDATION FUNCTIONS */

var nbsp = 160;    // non-breaking space char
var node_text = 3; // DOM text node-type
var emptyString = /^\s*$/;
var glb_vfld;      // retain vfld for timer thread

// -----------------------------------------
//                  trim
// Trim leading/trailing whitespace off string
// -----------------------------------------
function trim(str)
{
  return str.replace(/^\s+|\s+$/g, '')
};


// -----------------------------------------
//                  setfocus
// Delayed focus setting to get around IE bug
// -----------------------------------------
function setFocusDelayed(vfld)
{
  glb_vfld.focus()
}

function setfocus(vfld)
{
  glb_vfld = vfld;
  setTimeout( 'setFocusDelayed()', 100 );
}


// -----------------------------------------
//                  msg
// Display warn/error message in HTML element
// commonCheck routine must have previously been called
// -----------------------------------------
function msg(fld,     // id of element to display message in
             msgtype, // class to give element ("formWarn" or "formError")
             message) // string to display
{
  // setting an empty string can give problems if later set to a 
  // non-empty string, so ensure a space present. (For Mozilla and Opera one could 
  // simply use a space, but IE demands something more, like a non-breaking space.)
  var dispmessage;
  if (emptyString.test(message)) 
    dispmessage = String.fromCharCode(nbsp);    
  else  
    dispmessage = message;

  var elem = document.getElementById(fld);
  elem.firstChild.nodeValue = dispmessage;  
  
  elem.className = msgtype;   // set the CSS class to adjust appearance of message
};

// -----------------------------------------
//            commonCheck
// Common code for all validation routines to:
// (a) check for older / less-equipped browsers
// (b) check if empty fields are required
// Returns true (validation passed), 
//         false (validation failed) or 
//         proceed (don't know yet)
// -----------------------------------------
var proceed = 2;  

function commonCheck    (vfld,   // element to be validated
                         ifld,   // id of element to receive info/error msg
                         reqd,   // true if required
						 lang)	 // italian or english
{
  if (!document.getElementById) 
    return true;  // not available on this browser - leave validation to the server
  var elem = document.getElementById(ifld);
  if (!elem.firstChild)
    return true;  // not available on this browser 
  if (elem.firstChild.nodeType != node_text)
    return true;  // ifld is wrong type of node  

  if (emptyString.test(vfld.value)) {
    if (reqd) {
      if (lang == 'en') {
	  	msg (ifld, "formError", "required");
	  } else {
		msg (ifld, "formError", "obbligatorio");
	  }
      setfocus(vfld);
      return false;
    }
    else {
      msg (ifld, "formWarn", "");   // OK
      return true;  
    }
  }
  return proceed;
}

// -----------------------------------------
//            validatePresent
// Validate if something has been entered
// Returns true if so 
// -----------------------------------------
function validatePresent(vfld,   // element to be validated
                         ifld,   // id of element to receive info/error msg
						 lang)   // italian or english
{
  var stat = commonCheck (vfld, ifld, true, lang);
  if (stat != proceed) return stat;

  var tfld = trim(vfld.value);  // value of field with whitespace trimmed off
  if (tfld == "") {
      if (lang == 'en') {
	  	msg (ifld, "formError", "required");
	  } else {
		msg (ifld, "formError", "obbligatorio");
	  }
	  return false;
  }
  else
    msg (ifld, "formWarn", "");
  return true;
};

// -----------------------------------------
//               validateEmail
// Validate if e-mail address
// Returns true if so (and also if could not be executed because of old browser)
// -----------------------------------------
function validateEmail  (vfld,   // element to be validated
                         ifld,   // id of element to receive info/error msg
                         reqd,   // true if required
						 lang)   // italian or english
{
  var stat = commonCheck (vfld, ifld, reqd, lang);
  if (stat != proceed) return stat;

  var tfld = trim(vfld.value);  // value of field with whitespace trimmed off
  var email = /^[^@]+@[^@.]+\.[^@]*\w\w$/
  if (!email.test(tfld)) {
    if (lang == 'en') {
		msg (ifld, "formError", "invalid e-mail address");
	} else {
		msg (ifld, "formError", "indirizzo e-mail errato");
	}
    setfocus(vfld);
    return false;
  }else
    msg (ifld, "formWarn", "");
  return true;
/*
  var email2 = /^[A-Za-z][\w.-]+@\w[\w.-]+\.[\w.-]*[A-Za-z][A-Za-z]$/
  if (!email2.test(tfld)) 
    msg (ifld, "formWarn", "Unusual e-mail address - check if correct");
  else
    msg (ifld, "formWarn", "");
  return true;
*/
};


// -----------------------------------------
//            validateTelnr
// Validate telephone number
// Returns true if so (and also if could not be executed because of old browser)
// Permits spaces, hyphens, brackets and leading +
// -----------------------------------------
function validateTelnr  (vfld,   // element to be validated
                         ifld,   // id of element to receive info/error msg
                         reqd,   // true if required
						 lang)	 // italian or english
{
  var stat = commonCheck (vfld, ifld, reqd, lang);
  if (stat != proceed) return stat;

  var tfld = trim(vfld.value);  // value of field with whitespace trimmed off
  var telnr = /^\+?[0-9 ()-]+[0-9]$/
  if (!telnr.test(tfld)) {
    if (lang == 'en') {
		msg (ifld, "formError", "not a valid telephone number. Characters permitted are digits, space ()- and leading +");
	} else {
		msg (ifld, "formError", "Numero di telefono non valido. Caratteri permessi sono numeri,spazi, () e + iniziale");		
	}
    setfocus(vfld);
    return false;
  }

  var numdigits = 0;
  for (var j=0; j<tfld.length; j++)
    if (tfld.charAt(j)>='0' && tfld.charAt(j)<='9') numdigits++;

  if (numdigits<3) {
    msg (ifld, "formError", numdigits + " digits - too short");
    setfocus(vfld);
    return false;
  }

  if (numdigits>13)
    msg (ifld, "formWarn", numdigits + " digits - check if correct");
  /*else  { 
    if (numdigits<10)
      msg (ifld, "formWarn", "Only " + numdigits + " digits - check if correct");*/
    else
      msg (ifld, "formWarn", "");
  
  return true;
  
};