browser_name = navigator.appName;
browser_version = parseFloat(navigator.appVersion);

if (browser_name == "Netscape" && browser_version >= 3.0) { roll = 'true'; }
else if (browser_name == "Microsoft Internet Explorer" && browser_version >= 3.0) { roll = 'true'; }
else { roll = 'false'; }

function over(img,ref) { if (roll == 'true') { document.images[img].src = ref; } }
function out(img,ref)  { if (roll == 'true') { document.images[img].src = ref; } }


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 menu (td,p,color,a,colorf)
{
if (p==1) {document.getElementById(td).style.background=color; document.getElementById(a).style.color=colorf;}
if (p==2) {document.getElementById(td).style.background=color; document.getElementById(a).style.color=colorf; }

}

function add_click (url) {
var p=document.getElementById(url).href;
location = p;
}

function preloadImg(file){
  image = new Image();
  image.src = file;
}

function rol_img() {
preloadImg('img/menu/top_m1o.gif');
preloadImg('img/menu/top_m2o.gif');
preloadImg('img/menu/top_m3o.gif');
preloadImg('img/menu/top_m4o.gif');
preloadImg('img/menu/top_m5o.gif');
preloadImg('img/menu/top_m6o.gif');
preloadImg('img/menu/top_m7o.gif');
preloadImg('img/bg_itemo.gif');
preloadImg('img/arrow.gif');
}