/*      Definition of Picture class

*  function getPictureAlt - returns the alt_text of the picture

*  function getPicture - returns the picture

*  function getPictureLink - returns the link of the picture

*/

function Picture(pic, picture_link, picture_alt) {

  this.Pic = new Image();

  this.Pic.src = pic;

  this.PictureLink = picture_link;

  this.PictureAlt = picture_alt;

  

  this.getPictureAlt = function getPictureAlt() {

    return this.PictureAlt;

  }

   

  this.getPicture = function getPicture() {

    return this.Pic;

  }

  

  this.getPictureLink = function getPictureLink() {

    return this.PictureLink;

  }

}



/*    Definition of Rotating Picture Class

*  function show - displays the initial picture, sets the size of the Div and starts the rotation process

*  function rotate - changes the picture according to parameteres

*/

function RotatingPicture(){



this.init = function init(id, width, height, interval, randomize, scale){

  this.Width = width;

  this.Height = height;

  this.Interval = interval;

  this.Randomize = randomize;

  this.Scale = scale;

  this.currentPic = 0;

  this.ID = id;

  this.Pics = new Array();

 }



this.show = function show(){

    //checks if there are any picture files

   if (this.Pics.length == 0){

     //window.alert(this.ID + " No pictures");

     var rpImg = document.getElementById( "RotatingPictureImg" + this.ID );

     rpImg.width = 0;

     rpImg.height = 0;

     this.Interval = 1;

   }else

   {

  var rpDiv = document.getElementById( "RotatingPictureDiv" + this.ID );

  rpDiv.style.width = this.Width;

  rpDiv.style.height = this.Height;

  this.currentPic = -1;

  this.rotate();      

  }

 }



this.rotate = function rotate(){

   var rpImg = document.getElementById( "RotatingPictureImg" + this.ID );

   var rpDiv = document.getElementById( "RotatingPictureDiv" + this.ID );

   //checks if there are any picture files

   if (this.Pics.length != 0){

   

   //if (this.Pics.length == 1 && rpImg.src == ""){

   //  return;

   //}

   if (this.Randomize == false){

     //checks if the last image is shown

     if(this.currentPic<this.Pics.length-1)

        this.currentPic++;

        else

        this.currentPic = 0;

   }

   else{

     var s = this.currentPic;

     

     //generates random values until they are different from currentPic - so that a different picture is shown

     do

       s = Math.floor(Math.random() * this.Pics.length);

     while(s == this.currentPic || s >= this.Pics.length)

     this.currentPic = s;

   }

   

   

   // if picture has link then set pointer to hand, else set pointer to default

   if ( this.Pics[ this.currentPic ].getPictureLink() != "" )

       rpDiv.style.cursor = "pointer";

    else

       rpDiv.style.cursor = "default";

       

   // if picture has alt then set picture alt

   if ( this.Pics[ this.currentPic ].getPictureAlt() != "" ){

       rpImg.alt = this.Pics[ this.currentPic ].getPictureAlt();

       rpImg.title = this.Pics[ this.currentPic ].getPictureAlt();

   } else {

       rpImg.alt = "";

       rpImg.title = "";

   }   

       

   //if scale then resize picture

   if (this.Scale){

	var image_width = this.Pics[ this.currentPic ].getPicture().width;

	var image_height = this.Pics[ this.currentPic ].getPicture().height;



	if(image_width > this.Width || image_height > this.Height){



		var proc_width = 100 - (this.Width * 100 / image_width);

		var proc_height = 100 - (this.Height * 100 / image_height);

		var proc = proc_width;

		if(proc < proc_height){

			proc = proc_height;

		}

		//window.alert(this.Pics[ this.currentPic ].getPicture().src + ":" + proc);

		 rpImg.src = "";

		rpImg.width = image_width - (image_width * proc / 100);

		rpImg.height = image_height - (image_height * proc / 100);

	}

	else{

		rpImg.src = "";

		rpImg.width = image_width;

		rpImg.height = image_height;

	}

  }

  //set picture to currentPic

   rpImg.src = this.Pics[ this.currentPic ].getPicture().src;

   rpImg.align = "center";

 }

//function to handle the link on the picture

this.goClick = function goClick(){

  if ( this.Pics[ this.currentPic ].getPictureLink() != "" )

    window.location = this.Pics[ this.currentPic ].getPictureLink();

 } 

 }

}