var myimages=new Array()
function preloadimages(){
for (i=0; i<preloadimages.arguments.length; i++){
	myimages[i]=new Image();
	myimages[i].src=preloadimages.arguments[i];
}
}
preloadimages(
	'graphics/home_o.gif', 
	'graphics/chisiamo_o.gif', 
	'graphics/servizio_o.gif',
	'graphics/gruppo_o.gif',
	'graphics/download_o.gif',
	'graphics/link_o.gif', 
	'graphics/contatti_o.gif',
	'graphics/home_big.png', 
	'graphics/chisiamo_big.png', 
	'graphics/servizio_big.png',
	'graphics/gruppo_big.png',
	'graphics/download_big.png',
	'graphics/link_big.png', 
	'graphics/contatti_big.png'
			);

function initRollovers() {

  if (!document.getElementById) return

    var aPreLoad = new Array();
    var sTempSrc;
    var aImages = document.getElementsByTagName('img');

    for (var i = 0; i < aImages.length; i++) {
    if (aImages[i].className == 'imgover') {
      var src = aImages[i].getAttribute('src');
      var ftype = src.substring(src.lastIndexOf('.'), src.length);
      var hsrc = src.replace(ftype, '_o'+ftype);

      aImages[i].setAttribute('hsrc', hsrc);

      aPreLoad[i] = new Image();
      aPreLoad[i].src = hsrc;

      aImages[i].onmouseover = function() {
      sTempSrc = this.getAttribute('src');
      this.setAttribute('src', this.getAttribute('hsrc'));
    }

    aImages[i].onmouseout = function() {
      if (!sTempSrc) sTempSrc = this.getAttribute('src').
          replace('_o'+ftype, ftype);
        this.setAttribute('src', sTempSrc);
      }
    }
  }
}

function externalLinks() { 
 if (!document.getElementsByTagName) return; 
 var anchors = document.getElementsByTagName("a"); 
 for (var i=0; i<anchors.length; i++) { 
   var anchor = anchors[i]; 
   if (anchor.getAttribute("href") && 
       anchor.getAttribute("rel") == "external") 
     anchor.target = "_blank"; 
 } 
}