//para el scroll de los banners
var bTimerArr = []; 
var bT;
var bC;
var bU;
var bD;
var pxToMove;
var bTimerArr;


function clearbTimerArr(){
  for (var i = 0; i < bTimerArr.length; i++) {
    clearInterval(bTimerArr[i]);
  }
}
function moveBanners(dir_){
  if(bT.height() > bC.height()){
    btTop=parseInt(bT.css('top'));
    //si el espacio se banner esta sobre su limite superior
    if(btTop < 0 )
      bT.css('top',parseInt(bT.css('top')) + dir_);
    //si esta en el limite superior y se dice que suba
    if(dir_ < 0)
      bT.css('top',parseInt(bT.css('top')) + dir_);
    //si llega a su limite inferior que no se pase
    if((parseInt(bC.height()) - btTop) >= parseInt(bT.height())){
      bT.css('top',parseInt(bC.height()) - parseInt(bT.height()));
      //si esta en su limite inferior, para que vuelva a bajar
      if(dir_ > 0)
        bT.css('top',parseInt(bC.height()) - parseInt(bT.height()) + dir_ );
    }
  } 
}


$(document).ready(function(){
  $("#main")
    .scrollable({
      vertical:true,
      circular:true,
      onSeek:function(){
        $("li","#main_navi").fadeTo('fast',1);
        $("li.active","#main_navi").fadeTo('fast',0.5);
      }
    })
    .navigator("#main_navi").
    autoscroll({interval:5000});
  $("#culturaNav")
      .scrollable({
	      circular:true
      })
      .navigator("#naviCult").autoscroll({interval:3000});
  var randomnumber=Math.floor(Math.random()*($('li',"#main_navi").length)+1);
  $("li","#main_navi").eq(randomnumber-1).click();
  $("#main_navi li,#naviCult li").hover(
    function(){
      $(this).fadeTo('fast',0.5);
    },function(){
      $(this).fadeTo('fast',1);
    }
  );
  $("a","#main_navi, #naviCult").click(function(){
    document.location=$(this).attr("href");
  });
  $(".active").live('mouseout',function(){
    $(this).fadeTo('fast',1);
  });
  
  bT=jQuery('.bannContent .cnt','.Banners');
  bC=jQuery('.bannContent','.Banners');
  bU=jQuery('.bannUp','.Banners');
  bD=jQuery('.bannDown','.Banners');
  pxToMove=20;
  //banners moverlos
  bU.hover(function(){
    bTimerArr[bTimerArr.length] = setInterval("moveBanners("+pxToMove+")",100);
  },function(){
    clearbTimerArr();
  });
  bD.hover(function(){
    bTimerArr[bTimerArr.length] = setInterval("moveBanners(-"+pxToMove+")",100);
  },function(){
    clearbTimerArr();
  });    
  //fix the height
  bT.height(Math.ceil((bT.height()/pxToMove))*pxToMove);
});



var imagenumber = 5; 
var randomnumber = Math.random(); 
var rand1 = Math.round( (imagenumber-1) * randomnumber); 

images = new Array; 
images[0] = "http://www.unal.edu.co/UNAL_site/virtuales/images/1.jpg"; 
images[1] = "http://www.unal.edu.co/UNAL_site/virtuales/images/2.jpg"; 
images[2] = "http://www.unal.edu.co/UNAL_site/virtuales/images/3.jpg"; 
images[3] = "http://www.unal.edu.co/UNAL_site/virtuales/images/4.jpg"; 
images[4] = "http://www.unal.edu.co/UNAL_site/virtuales/images/5.jpg"; 
links = new Array; 
links[0] = "index.html", target="_blank"; 
links[1] = "index.html", target="_blank";
links[2] = "index.html", target="_blank";
links[3] = "index.html", target="_blank"; 
links[4] = "index.html", target="_blank";
var image = images[rand1]; 
var link = links[rand1]; 


jQuery(document).ready(function(){
	$("#unal_logo").css({"cursor":"pointer"}).click(function(){
	  document.location="http://www.unal.edu.co";
	});
});