Javascript Array inArray(val) method

Array.prototype.inArray = function(val) {
  var l = this.length;
  for(var i = 0; i < l; i++) {
    if(this[i] == val) {
      return true;
    }/*from   w w w. j a  va  2s  .  c  om*/
  }
  return false;
}

Array.prototype.inArray = function(val){
    for (var key in this){
        if(this[key] == val)
        {/* w  w w . j a v a 2s.co  m*/
            return true;
        }
    };
    return false;
}

Array.prototype.inArray= function(i){
    var _this = this;
    for(var x=0; x<_this.length; x++){
        if(_this[x]==i) return x;
    }//www.  j  av a  2 s. co  m
    return -1;
}

Array.prototype.inArray = function (value) {
  var i;//from  w w  w.ja va2  s .c  o m
  for (i=0; i < this.length; i++) {
    if (this[i] === value) {
      return true;
    }
  }
  return false;
};

///*from w  ww. j a v  a2  s.c o m*/
Array.prototype.inArray = function (value){
    var i;
    for (i=0; i < this.length; i++) {
        if (this[i] === value) {
            return true;
        }
    }
    return false;
};

if (!invo.lang) { invo.lang = {}; }

/*/*from  ww  w  .java2  s  .c  o m*/
 JS has no built in function for inArray, so I have borrowed this
 one, used by a bajillion different people.
 
 Note that you can change the === is only available in modern JS
 implementations. it tests to see if the value passed in is both
 a) the same name and b) the same object type.
*/
Array.prototype.inArray = function (value) {
 for (var i=0; i < this.length; i++) {
  if (this[i] === value) {
   return true;
  }
 }
 return false;
};

// Determine wheter an element is in the array or not
Array.prototype.inArray = function (value) {
  var index = this.indexOf(value)
  if (index != -1) {
    return true//from  w w w  . j ava2s.com
  }
  return false
}