var m_nSwitchMode = 3;
var m_nSwitchIndexImage1;
var m_nSwitchIndexImage2;
var m_nInterval = 4000;
var m_pSwitchOrder = new Array();
var m_pImageDescriptions = new Array();
//Preload only for load imagees from server
var m_pPreload = new Array();

//-----------------------------------------------------------
//-----------------------------------------------------------
//Init
function doInitPhotos()
{
  //0	  
  doAddImage("images/la/Complex/large/lamain.jpg",
						 "Aparthotel Los Alisios",
						 "la.html");

  //1	  
  doAddImage("images/la/No308B/large/la308Bmain.jpg",
						 "No.308B Aparthotel Los Alisios",
						 "la308B.html");
						 
  //2	  
  doAddImage("images/la/No410B/large/la410Bmain.jpg",
						 "No.410B Aparthotel Los Alisios",
						 "la410B.html");


  doInitSwitchOrder();	
}

//-----------------------------------------------------------
//-----------------------------------------------------------
function doInitSwitchOrder()
{
  m_pSwitchOrder = new Array();
  switch (m_nSwitchMode) {
    case 3 :  //Random Order
						m_pSwitchOrder.push(0);
						m_pSwitchOrder.push(1);
						m_pSwitchOrder.push(2);
						m_nSwitchIndexImage1 = 0; 
						break;						
  }
}

//-----------------------------------------------------------
//-----------------------------------------------------------
function doAddImage(i_strSrc, i_strAlt, i_strLink)
{
			m_pPreload.push(new Image()); 
			m_pPreload[m_pPreload.length -1].src = i_strSrc;	
			pImageDesciption = new Array();
			pImageDesciption.push(i_strSrc);
			pImageDesciption.push(i_strAlt);
			pImageDesciption.push(i_strLink);	
			m_pImageDescriptions.push(pImageDesciption);
}

//-----------------------------------------------------------
//-----------------------------------------------------------
//Swapper

function doStartPhotoSwap()
{
	 setTimeout("doSwap()", m_nInterval);	
}

//-----------------------------------------------------------
//-----------------------------------------------------------
function setImage(i_pImageDescription, i_strHRefTag, i_strImageTag)
{
 	if(i_pImageDescription != null)
 	{
	   pHRefElement = document.getElementById(i_strHRefTag);
	   if(pHRefElement != null) {
	    	pHRefElement.href = i_pImageDescription[2];
	   }
	   pImageElement= document.images[i_strImageTag];
				if(pImageElement != null) {
						pImageElement.src = i_pImageDescription[0]; 
						pImageElement.alt = i_pImageDescription[1]; 
						pImageElement.title = i_pImageDescription[1];	
				}
	 }
}

//-----------------------------------------------------------
//-----------------------------------------------------------
function doSwap()
{
  var nImageDescIndex1;
  var nImageDescIndex2;
  //   
  switch (m_nSwitchMode) {
    case 1 : //Fixed Order
				  nImageDescIndex1 = m_nSwitchIndexImage1 + 2; 
    		nImageDescIndex2 = nImageDescIndex1 + 1; 						
				  break;
				case 2: //Rotating Order - UP 
				  nImageDescIndex1 = m_nSwitchIndexImage1 + 1;
    		nImageDescIndex2 = nImageDescIndex1 + 1; 						
						break;
				case 3: //Random Order
				  do {
				     nImageDescIndex1 = Math.floor(Math.random()* m_pSwitchOrder.length);
				     nImageDescIndex2 = Math.floor(Math.random()* m_pSwitchOrder.length);
									//Always show different images and never the same
	       } while (nImageDescIndex1 ==  m_nSwitchIndexImage1 ||  
								         nImageDescIndex1 ==  m_nSwitchIndexImage2 || 
								         nImageDescIndex2 ==  m_nSwitchIndexImage1 || 
								         nImageDescIndex2 ==  m_nSwitchIndexImage2 ||
																	nImageDescIndex1 ==  nImageDescIndex2);
						break;
		}		
		//range check 
		if (nImageDescIndex1 > m_pSwitchOrder.length - 1) {
				nImageDescIndex1 = 0;
  }
		if (nImageDescIndex2 > m_pSwitchOrder.length -1) {
				nImageDescIndex2 = 0; 
		}
		//record last images	  
  m_nSwitchIndexImage1 = nImageDescIndex1;
  m_nSwitchIndexImage2 = nImageDescIndex2;
	 //Show Images
  setImage(m_pImageDescriptions[m_pSwitchOrder[nImageDescIndex1]], "atop", "topimg" );
  setImage(m_pImageDescriptions[m_pSwitchOrder[nImageDescIndex2]], "abott", "bottimg");
  //Restart Timer
  setTimeout("doSwap()", m_nInterval);	
}