function checkFields(FormObj, fnames, ftypes, mins, maxs, errors, invalidchars, reqd)
{
   var len = fnames.length;
   var errorList = new Array();
   var errorIndex = new Array();
   var errorOccured = false;
   var index = 0;
  
   for (i=0; i<len; i++)
   {
   	var vType = ftypes[i].toLowerCase(); 
   	var reqVal = reqd[i].toLowerCase();
   	var stringval = eval("FormObj." + fnames[i] + ".value");
   	var doValidation = ((reqVal == "true") || ((reqVal == "false") && (stringval != "")));
	if (doValidation)
   	{
   	switch (vType)
   	{
   	 case "string" :
   	  errorOccured = (!(validString(stringval, mins[i], maxs[i], invalidchars[i])));
   	  break;
   	  
   	 case "integer" :
   	  errorOccured = (!(validInteger(stringval, mins[i], maxs[i])));
   	  break;
   	  
   	 case "float" :
   	  errorOccured = (!(validFloat(stringval, mins[i], maxs[i])));
   	  break;
   	  
   	  case "email" :
   	  errorOccured = (!(validEmail(stringval)));
   	  break;
   	  
   	  case "ipaddress" :
   	  errorOccured = (!(validIpaddress(stringval)));
   	  break;
   	  
   	  case "none" :
	  errorOccured = (stringval == "");
	  break;
   	  
   	 default :
   	 break;
      	}
       	}
       	
        if (errorOccured)
        {
         errorList[index]  = errors[i];
         errorIndex[index] = i;
         index = index + 1;
         errorOccured = false;
        }
        
        
   
   }

   if (errorList.length > 0)
   {
    var handle = window.open("", "ewin","location=no,menubar=no,width=400,height=400,status=no,toolbar=no,resizable=yes");
    
    var doc = handle.document;
    doc.write("<title> Errores de forma.  </title>");
    doc.write("<H3> Había errores en la forma. </H3>");
    

    for (var j=0; j< errorList.length; j++)
    {
    
    doc.writeln("<br> <a href=\"javascript:window.opener.document." + FormObj.name + "." + fnames[errorIndex[j]] + ".focus(); javascript:window.close();" + "\"> " + errorList[j] + "</a>");
    }
    doc.close();
    handle.focus();
    return false;
   }
   if (handle!=null) 
   {
   	handle.close();
   }
   return true;
}


function validString(stringval, min, max, invalidchars)
{
  var i = 0;
  for (i=0; i< invalidchars.length; i++)
  {
  	if (stringval.indexOf(invalidchars.charAt(i)) != -1)
  	{
  		return false;
  	}
  }
  minlen = parseInt(min);
  maxlen = parseInt(max);
  return ((stringval.length >= minlen) && (stringval.length <= maxlen));
}


function validInteger(stringval, min, max)
{
 if (isDigits(stringval))
 {
  return isInRangeInt(stringval, parseInt(min), parseInt(max));
 }
 else
 {
  return false;
 }
}

function validFloat(stringval, min, max)
{
 if (isNumber(stringval))
 {
  return isInRangeFloat(stringval, parseFloat(min), parseFloat(max));
 }
 else
 {
  return false;
 }
}


function isDigits(str) 
{
	var ind;
	for (ind = 0; ind < str.length; ind++) 
	{
		mychar = str.charAt(ind);
		if (mychar < '0' || mychar > '9')
		{
			return false;
		}
	}
	return true;
	
}

function isNumber(str) 
{
	numdecs = 0;
	for (ind = 0; ind < str.length; ind++) 
	{
		mychar = str.charAt(ind);
		if ((mychar >= '0' && mychar <= '9') || mychar == '.') 
		{
			if (mychar == '.')
			{
				numdecs++;
			}
		}
		else 
		{
			return false;
		}
	}
	if (numdecs > 1)
	{
		return false;	
	}
	
return true;
}

function isInRangeInt(str, num1, num2) 
{
	var intG = parseInt(str);
	return ((intG >= num1) && (intG <= num2));

}

function isInRangeFloat(str, num1, num2) 
{
	var intF = parseFloat(str);
	return ((intF >= num1) && (intF <= num2));
}


function openWin(helptext)
{
    var handle = window.open("", "ewin1","location=no,menubar=no,width=400,height=300,status=no,toolbar=no,resizable=yes");
    var doc = handle.document;
    doc.write("<title> Ayuda  </title>");
    doc.write(helptext);
    doc.close();
    handle.focus();
}

function validEmail(emailStr) 
{
var checkTLD=1;

var emailPat=/^(.+)@(.+)$/;

/* The following string represents the pattern for matching all special
characters.  We don't want to allow special characters in the address. 
These characters include ( ) < > @ , ; : \ " . [ ] */

var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";

/* The following string represents the range of characters allowed in a 
username or domainname.  It really states which chars aren't allowed.*/

var validChars="\[^\\s" + specialChars + "\]";

/* The following pattern applies if the "user" is a quoted string (in
which case, there are no rules about which characters are allowed
and which aren't; anything goes).  E.g. "jiminy cricket"@disney.com
is a legal e-mail address. */

var quotedUser="(\"[^\"]*\")";

/* The following pattern applies for domains that are IP addresses,
rather than symbolic names.  E.g. joe@[123.124.233.4] is a legal
e-mail address. NOTE: The square brackets are required. */

var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;

/* The following string represents an atom (basically a series of non-special characters.) */

var atom=validChars + '+';

/* The following string represents one word in the typical username.
For example, in john.doe@somewhere.com, john and doe are words.
Basically, a word is either an atom or quoted string. */

var word="(" + atom + "|" + quotedUser + ")";

// The following pattern describes the structure of the user

var userPat=new RegExp("^" + word + "(\\." + word + ")*$");

/* The following pattern describes the structure of a normal symbolic
domain, as opposed to ipDomainPat, shown above. */

var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");

/* Finally, let's start trying to figure out if the supplied address is valid. */

/* Begin with the coarse pattern to simply break up user@domain into
different pieces that are easy to analyze. */

var matchArray=emailStr.match(emailPat);

if (matchArray==null) {

/* Too many/few @'s or something; basically, this address doesn't
even fit the general mould of a valid e-mail address. */

//alert("Email address seems incorrect (check @ and .'s)");
return false;
}
var user=matchArray[1];
var domain=matchArray[2];

// Start by checking that only basic ASCII characters are in the strings (0-127).

for (i=0; i<user.length; i++) {
if (user.charCodeAt(i)>127) {
//alert("Ths username contains invalid characters.");
return false;
   }
}
for (i=0; i<domain.length; i++) {
if (domain.charCodeAt(i)>127) {
//alert("Ths domain name contains invalid characters.");
return false;
   }
}

// See if "user" is valid 

if (user.match(userPat)==null) {

// user is not valid

//alert("The username doesn't seem to be valid.");
return false;
}

/* if the e-mail address is at an IP address (as opposed to a symbolic
host name) make sure the IP address is valid. */

var IPArray=domain.match(ipDomainPat);
if (IPArray!=null) {

// this is an IP address

for (var i=1;i<=4;i++) {
if (IPArray[i]>255) {
//alert("Destination IP address is invalid!");
return false;
   }
}
return true;
}

// Domain is symbolic name.  Check if it's valid.
 
var atomPat=new RegExp("^" + atom + "$");
var domArr=domain.split(".");
var len=domArr.length;
for (i=0;i<len;i++) {
if (domArr[i].search(atomPat)==-1) {
//alert("The domain name does not seem to be valid.");
return false;
   }
}

/* domain name seems valid, but now make sure that it ends in a
known top-level domain (like com, edu, gov) or a two-letter word,
representing country (uk, nl), and that there's a hostname preceding 
the domain or country. */

//if (checkTLD && domArr[domArr.length-1].length!=2) {
//alert("The address must end in a well-known domain or two letter " + "country.");
//return false;
//}

// Make sure there's a host name preceding the domain.

//if (len<2) {
//alert("This address is missing a hostname!");
//return false;
//}

// If we've gotten this far, everything's valid!
return true;
}

function validIpaddress(val)
{
    if (val.search(/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/) != -1) {
        var myArray = val.split(/\./);
        if (myArray[0] > 255 || myArray[1] > 255 || myArray[2] > 255 || myArray[3] > 255)
            return false;
        if (myArray[0] == 0 && myArray[1] == 0 && myArray[2] == 0 && myArray[3] == 0)
            return false;
        return true;
    }
    else
        return false;
}


function displayStatusMsg(msgStr) { 
  status=msgStr;
  document.MM_returnValue = true;
}




function getCookie(name) 
{
  if (document.cookie)
  {
  var tCookie = document.cookie;		
  var index = tCookie.indexOf(name + "=");
  if (index == -1) return null;
  index = tCookie.indexOf("=", index) + 1;
  var endstr = tCookie.indexOf(";", index);
  if (endstr == -1) endstr = tCookie.length;
  return unescape(tCookie.substring(index, endstr));
  }
  else
  {
  return "";
  }
}



function setCookie(name, value) 
{ 
    var today = new Date();
    var expiry = new Date(today.getTime() + 365 * 24 * 60 * 60 * 1000); // plus 28 days
    if (value != null && value != "")
      document.cookie=name + "=" + escape(value) + "; expires=" + expiry.toGMTString();
}