Number.max = function (a,b) {
    return a<b?b:a;
}

Number.min = function (a,b) {
    return a>b?b:a;
}

Math.mod = function(val,mod) {
    if (val < 0) {
        while(val<0) val += mod;
        return val;
    } else {
        return val%mod;
    }
}

window.getInnerWidth = function() {
    if (window.innerWidth) {
        return window.innerWidth;
    } else if (document.body.clientWidth) {
        return document.body.clientWidth;
    } else if (document.documentElement.clientWidth) {
        return document.documentElement.clientWidth;
    }
} 

window.getInnerHeight = function() {
    if (window.innerHeight) {
        return window.innerHeight;
    } else if (document.body.clientHeight) {
        return document.body.clientHeight;
    } else if (document.documentElement.clientHeight) {
        return document.documentElement.clientHeight;
    }
} 

String.prototype.endsWith = function(str) {
    return (this.length-str.length)==this.lastIndexOf(str);
}

String.prototype.reverse = function() {
    var s = "";
    var i = this.length;
    while (i>0) {
        s += this.substring(i-1,i);
        i--;
    }
    return s;
}

// this trim was suggested by Tobias Hinnerup
String.prototype.trim = function() {
    return(this.replace(/^\s+/,'').replace(/\s+$/,''));
}

String.prototype.toInt = function() {
    var a = new Array();
    for (var i = 0; i < this.length; i++) {
        a[i] = this.charCodeAt(i);
    }
    return a;
}

Array.prototype.intArrayToString = function() {
    var a = new String();
    for (var i = 0; i < this.length; i++) {
        if(typeof this[i] != "number") {
            throw new Error("Array must be all numbers");
        } else if (this[i] < 0) {
            throw new Error("Numbers must be 0 and up");
        }
        a += String.fromCharCode(this[i]);
    }
    return a;    
}

Array.prototype.compareArrays = function(arr) {
    if (this.length != arr.length) return false;
    for (var i = 0; i < arr.length; i++) {
        if (this[i].compareArrays) { //likely nested array
            if (!this[i].compareArrays(arr[i])) return false;
            else continue;
        }
        if (this[i] != arr[i]) return false;
    }
    return true;
}

Array.prototype.map = function(fnc) {
    var a = new Array(this.length);
    for (var i = 0; i < this.length; i++) {
        a[i] = fnc(this[i]);
    }
    return a;
}

Array.prototype.foldr = function(fnc,start) {
    var a = start;
    for (var i = this.length-1; i > -1; i--) {
        a = fnc(this[i],a);
    }
    return a;
}

Array.prototype.foldl = function(fnc,start) {
    var a = start;
    for (var i = 0; i < this.length; i++) {
        a = fnc(this[i],a);
    }
    return a;
}

Array.prototype.exists = function (x) {
    for (var i = 0; i < this.length; i++) {
        if (this[i] == x) return true;
    }
    return false;
}

Array.prototype.filter = function(fnc) {
    var a = new Array();
    for (var i = 0; i < this.length; i++) {
        if (fnc(this[i])) {
            a.push(this[i]);
        }
    }
    return a;
}

Array.prototype.random = function() {
    return this[Math.floor((Math.random()*this.length))];
}

String.prototype.trim = function() {
    return this.replace(/^\s+|\s+$/g,"");
}
String.prototype.ltrim = function() {
    return this.replace(/^\s+/,"");
}
String.prototype.rtrim = function() {
    return this.replace(/\s+$/,"");
}

var Popup = Class.create();
Popup.prototype = 
{
  initialize: function(options)
  {
    this.options = {
      url: '#',
      width: 700,
      height: 500,
      name:"_blank",
      location:"no",
      menubar:"no",
      toolbar:"no",
      status:"no",
      scrollbars:"no",
      resizable:"no",
      left:"",
      top:"",
      normal:false
    }
	
   Object.extend(this.options, options || {});

    if (this.options.normal){
        this.options.menubar = "yes";
        this.options.status = "yes";
        this.options.toolbar = "yes";
        this.options.location = "yes";
    }

    this.options.width = this.options.width < screen.availWidth?this.options.width:screen.availWidth;
    this.options.height=this.options.height < screen.availHeight?this.options.height:screen.availHeight;
    var openoptions = 'width='+this.options.width+',height='+this.options.height+',location='+this.options.location+',menubar='+this.options.menubar+',toolbar='+this.options.toolbar+',scrollbars='+this.options.scrollbars+',resizable='+this.options.resizable+',status='+this.options.status
    if (this.options.top!="")openoptions+=",top="+this.options.top;
    if (this.options.left!="")openoptions+=",left="+this.options.left;
    window.open(this.options.url, this.options.name,openoptions );
    return false;
  }
}

Effect.BlindRight = function(element) {
  element = $(element);
  var elementDimensions = element.getDimensions();
  return new Effect.Scale(element, 100, Object.extend({
    scaleContent: false,
    scaleY: false,
    scaleFrom: 0,
    scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
    restoreAfterFinish: true,
    afterSetup: function(effect) {
      effect.element.makeClipping().setStyle({
        width: '0px',
        height: effect.dims[0] + 'px'
      }).show();
    },
    afterFinishInternal: function(effect) {
      effect.element.undoClipping();
    }
  }, arguments[1] || { }));
};