//button image names 
var buttons = new Array("menuMetangala"); 

var imgs = new Array; 
//for(i=0;i<5;i++){ 
//    //preload images 
//    imgs[i] = new Array; 
//    imgs[i][0] = new Image; 
//    imgs[i][0].src = 'resources/button_'+buttons[i]+'.gif'; 
//    imgs[i][1] = new Image; 
//    imgs[i][1].src = 'resources/button_'+buttons[i]+'_pressed.gif'; 
imgs[0] = new Array;
imgs[0][0] = new Image;
imgs[0][0].src = 'images/cultura.gif';
imgs[0][1] = new Image;
imgs[0][1].src = 'images/cultura_on.gif';
imgs[1] = new Array;
imgs[1][0] = new Image;
imgs[1][0].src = 'images/spettacoli.gif';
imgs[1][1] = new Image;
imgs[1][1].src = 'images/spettacoli_on.gif';
imgs[2] = new Array;
imgs[2][0] = new Image;
imgs[2][0].src = 'images/corsi.gif';
imgs[2][1] = new Image;
imgs[2][1].src = 'images/corsi_on.gif';
imgs[3] = new Array;
imgs[3][0] = new Image;
imgs[3][0].src = 'images/foto.gif';
imgs[3][1] = new Image;
imgs[3][1].src = 'images/foto_on.gif';
//    } 


var imgObj; 
function over(imgNum) { 

    //if script is ready 
    if(menuReadyState) { 

        //reset all images 
        menuClosingFunction(); 

        //get image object 
        if(ns4) { imgObj = document.layers["navlayer"].document.images["b"+imgNum]; } 
        else { imgObj = document.images["b"+imgNum]; } 

        //change image 
        imgObj.src = imgs[imgNum][1].src; 

        //find position of image 
        xPos = getRealLeft(imgObj); 
        yPos = getRealTop(imgObj); 

        //activate menu with returned co-ordinates 
        activateMenu(imgNum,xPos,yPos+4+imgObj.height); 

        } 

} 

function menuClosingFunction() { 
    //reset all images 
    for(i=0;i<3;i++){ 
        if(ns4) { imgObj = document.layers["navlayer"].document.images["b"+i]; } 
        else { imgObj = document.images["b"+i]; } 
        imgObj.src = imgs[i][0].src; 
        } 
} 

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}