function escape_utf8(data) {

	if (data == '' || data == null){
		return '';
	}
	data = data.toString();
	var buffer = '';
	for(var i=0; i<data.length; i++){
		var c = data.charCodeAt(i);
		var bs = new Array();

		if (c > 0x10000){
			// 4 bytes
			bs[0] = 0xF0 | ((c & 0x1C0000) >>> 18);
			bs[1] = 0x80 | ((c & 0x3F000) >>> 12);
			bs[2] = 0x80 | ((c & 0xFC0) >>> 6);
			bs[3] = 0x80 | (c & 0x3F);

		}else if (c > 0x800){
			// 3 bytes
			bs[0] = 0xE0 | ((c & 0xF000) >>> 12);
			bs[1] = 0x80 | ((c & 0xFC0) >>> 6);
			bs[2] = 0x80 | (c & 0x3F);

		}else if (c > 0x80){
			// 2 bytes
			bs[0] = 0xC0 | ((c & 0x7C0) >>> 6);
			bs[1] = 0x80 | (c & 0x3F);

		}else{
			// 1 byte
			bs[0] = c;
		}

		for(var j=0; j<bs.length; j++){
			var b = bs[j];
			var hex = nibble_to_hex((b & 0xF0) >>> 4) + nibble_to_hex(b & 0x0F);
			buffer += '%'+hex;
		}
	}

	return buffer;
}

function nibble_to_hex(nibble){
	var chars = '0123456789ABCDEF';
	return chars.charAt(nibble);
}

// String helper functions

String.prototype.chop = function() {
	return this;
}

function trim(s) {
  while (s.substring(0,1) == ' ') {
    s = s.substring(1,s.length);
  }
  while (s.substring(s.length-1,s.length) == ' ') {
    s = s.substring(0,s.length-1);
  }
  return s;
}

String.prototype.nl2br = function() {
	return this.split('\n').join('<br \/>\n');
}
/*
String.prototype.replace = function(find,replace) {
	return this.split(find).join(replace);
}*/

String.prototype.escapeForXML = function() {
	return this.replace('&', '&amp;').replace('"', '&quot;').replace('<', '&lt;').replace('>', '&gt;');
}

String.prototype.escapeForDisplay = function() {
	return this.replace('<', '&lt;');
}

String.prototype.truncate_with_ellipses = function(chars_allowed) {
	var t = this;
	if (t.length > chars_allowed-3) {
		t = t.substr(0, chars_allowed-3)+'...'
	}
	return t;
}

// Cookies
function setCookie(sName, sValue, oExpires, sPath, sDomain, bSecure) {
  var sCookie = sName + "=" + encodeURIComponent(sValue);
                
  if (oExpires) {
    sCookie += "; expires=" + oExpires.toGMTString();
  }
                
  if (sPath) {
    sCookie += "; path=" + sPath;
  }
                
                    if (sDomain) {
                        sCookie += "; domain=" + sDomain;
                    }
                
                    if (bSecure) {
                        sCookie += "; secure";
                    }
                
                    document.cookie = sCookie;
                }
                                
                function getCookie(sName) {
                
                    var sRE = "(?:; )?" + sName + "=([^;]*);?";
                    var oRE = new RegExp(sRE);
                    
                    if (oRE.test(document.cookie)) {
                        return decodeURIComponent(RegExp["$1"]);
                    } else {
                        return null;
                    }
                
                }                

function deleteCookie(sName, sPath, sDomain) {
                    var sCookie = sName + "=; expires=" + (new Date(0)).toGMTString();
                    if (sPath) {
                        sCookie += "; path=" + sPath;
                    }
                
                    if (sDomain) {
                        sCookie += "; domain=" + sDomain;
                    }
                    
                    document.cookie = sCookie;
                }

function emailCheck (emailStr) {
/* The following pattern is used to check if the entered e-mail address
   fits the user@domain format.  It also is used to separate the username
   from the domain. */
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]

// 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
var domainArray=domain.match(domainPat)
if (domainArray==null) {
	//alert("The domain name doesn't seem to be valid.")
    return false
}

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

/* Now we need to break up the domain to get a count of how many atoms
   it consists of. */
var atomPat=new RegExp(atom,"g")
var domArr=domain.match(atomPat)
var len=domArr.length
if (domArr[domArr.length-1].length<2 || 
    domArr[domArr.length-1].length>5) {
   // the address must end in a two letter or three letter word.
   //alert("The address must end in a three-letter domain, or two letter country.")
   return false
}

// Make sure there's a host name preceding the domain.
if (len<2) {
   //var errStr="This address is missing a hostname!"
   //alert(errStr)
   return false
}

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