/**
* Common functions.
* @author Vladan Antic.
* @date 2006-2007.
* @version 1.2.
*/

var isSafari = false;
var isMoz    = false;
var isIE     = false;
var isOpera  = false;

if (navigator.userAgent.indexOf("Safari") > 0) {
    isSafari = true;
} else if (navigator.product == "Gecko") {
    isMoz = true;
} else if (navigator.userAgent.indexOf('Opera') >= 0) {
    isOpera = true;
} else if (navigator.userAgent.indexOf('MSIE') >= 0 && navigator.userAgent.indexOf('Opera') < 0) {
    isIE = true;
}


function setElement(elm, prm) {
    if (elm == null || prm == null) return false;
    if (!(e = $(elm)))
        e = elm;
    
    for (var i=0; i<prm.length; i++){
        if (prm[i][0] == null || prm[i][1] == null)
            return false;
            
        k = prm[i][0];
        v = prm[i][1];
        
        eval("e."+k+" = v");
    }
    return true;
}

function getElementWidth(element) {
    element = $(element);
    return element.offsetWidth;
}

function getWindowWidth() {
  var w = 0;
  if (self.innerWidth)
    w = self.innerWidth;
  else if (document.documentElement && document.documentElement.clientWidth)
    w = document.documentElement.clientWidth;
  else if (document.body)
    w = document.body.clientWidth;
  return w;
}

function getWindowHeight() {
  var h = 0;
  if (self.innerHeight)
    h = self.innerHeight;
  else if (document.documentElement && document.documentElement.clientHeight)
    h = document.documentElement.clientHeight;
  else if (document.body)
    h = document.body.clientHeight;
  return h;
}

function getDocumentWidth() {
  var w = getWindowWidth();
  if(document.width && w < document.width) w = document.width;
  else if(document.body.offsetWidth && w < document.body.offsetWidth) w = document.body.offsetWidth;
  return w;
}

function getDocumentHeight() {
  var h = getWindowHeight();
  if(document.height && h < document.height) h = document.height;
  else if(document.body.offsetHeight && h < document.body.offsetHeight) h = document.body.offsetHeight;
  return h;
}

function getWindowYOffset() {
  var y = 0;
  if(window.pageYOffset)
    y = window.pageYOffset;
  else if (document.documentElement && document.documentElement.scrollTop)
    y = document.documentElement.scrollTop;
  return y;
}

function objAlpha(element, nOpacity) {
  var obj = $(element);
  obj.style.opacity = (nOpacity/100);
  obj.style.MozOpacity = (nOpacity/100);
  obj.style.KhtmlOpacity = (nOpacity/100);
  obj.style.filter = "alpha(opacity=" + nOpacity + ")";
}

function findElement(id){
    element = getElement(id);
    if (!element)
        return false;
        
    return position = getPosition(element); 
}
function getElement(id){
    if (document.getElementById(id))
        return document.getElementById(id);
    return null;
}
function getPosition(element){
    var x = 0;
    var y = 0;
    while (element != null){
        x += element.offsetLeft - element.scrollLeft;
        y += element.offsetTop - element.scrollTop;
        element = element.offsetParent;
    }
    return {x:x,y:y};
}

/* ----------------------- */

function isAlien(a) {
  return isObject(a) && typeof a.constructor != 'function';
}

function isArray(a) {
  return isObject(a) && a.constructor == Array;
}

function isBoolean(a) {
  return typeof a == 'boolean';
}

function isEmpty(o) {
  var i, v;
  if (isObject(o)) {
    for (i in o) {
      v = o[i];
      if (isUndefined(v) && isFunction(v)) {
        return false;
      }
    }
  }
  return true;
}

function isFunction(a) {
  return typeof a == 'function';
}

function isNull(a) {
  return typeof a == 'object' && !a;
}

function isNumber(a) {
  return typeof a == 'number' && isFinite(a);
}

function isObject(a) {
  return (a && typeof a == 'object') || isFunction(a);
}

function isString(a) {
  return typeof a == 'string';
}

function isUndefined(a) {
  return typeof a == 'undefined';
}

function getPropertyByName(node, nodeName) {
  var arr = new Array();
  var items = node.getElementsByTagName("name");
  for (var i=0; i<items.length; i++) {
    if (nodeName == items[i].firstChild.nodeValue) {
      arr[0] = items[i].firstChild.nodeValue;
      arr[1] = items[i].parentNode.getElementsByTagName("value")[0].firstChild.nodeValue;
      return arr;
    }
  }
  return null;
}

function getValueForNode(node, nodeName) {
  var arr = getPropertyByName(node, nodeName);
  return arr != null ? arr[1] : null;
}

function evalBoolean(value, defaultValue) {
  if (!isNull(value) && isString(value)) {
    return ("true" == value.toLowerCase() || "yes" == value.toLowerCase()) ? "true" : "false";
  } else {
    return defaultValue == true ? "true" : "false";
  }
}

function replaceWithValue(sourceString, regExp, element) {
  var retString = "";
  switch (element.type) {
    case 'checkbox':
    case 'radio':
    case 'text':
    case 'textarea':
    case 'password':
    case 'hidden':
    case 'select-one':
    case 'select-multiple':
      retString = sourceString.replace(regExp, encodeEscChr($F(element)));
      break;
    default:
      retString = sourceString.replace(regExp, encodeEscChr(element.innerHTML));
      break;
  }
  return retString;
}

function arrayToParameterString(array) {
  var str = '';
  for (var i=0; i<array.length; i++) {
    // escape parameter values
    var pair = array[i].split('=');
    if (pair.length == 2) {
      str += (i >= 0 ? '&' : '') + pair[0] + '=' + escape(pair[1]);
    } else {
      str += (i >= 0 ? '&' : '') + array[i];
    }
  }
  return str;
}

function decodeHtml(sourceString) {
  var retString = sourceString.replace(/&amp;/, "&");
  retString = retString.replace(/&lt;/, "<");
  retString = retString.replace(/&gt;/, ">");
  return retString;
}

function encodeEscChr(inVar) {
    inVar = inVar.replace(/&/g, "%26");
    inVar = inVar.replace(/'/g, "%27");
    inVar = inVar.replace(/"/g, "%22");
    inVar = inVar.replace(/\?/g, "%3F");
    inVar = inVar.replace(/\$/g, "%24");
    inVar = inVar.replace(/>/g, "%3E");
    inVar = inVar.replace(/</g, "%3C");
    inVar = inVar.replace(/%/g, "%25");
    inVar = inVar.replace(/\+/g, "%2B");
    return inVar;
}  
 
function trimString(str) {
    return str.replace(/ /g, '');
}

function truncateString(str, len, sfx){
    sfx = sfx || '';
    if (str.length > len){
        str = str.substr(0, len + 1);
        var ls = str.lastIndexOf(' ');
        if (ls < 1) ls = len; 
        str = str.substr(0, ls) + sfx;
    }
    return str;
}

function setStyle(obj, clss){
    if (obj){
        obj.className = clss;
    }
}

function isEnter(event) {
    if (event && event.which == 13)
        return true;
    else if (window.event && window.event.keyCode == 13)
        return true;
    else
        return false;
}

function clearField(obj, txt, css){
    if (obj && obj.value == txt){
        obj.value = '';
        if (css)
            obj.className = css;
    }
}