if (document.getElementById) { window.onload = swap };
function swap() {
    //var numimages=8;
    //rndimg = new Array("img/fondos/central0.png", "img/fondos/central1.png", "img/fondos/central2.png", "img/fondos/central3.png", "img/fondos/central4.png", "img/fondos/central5.png", "img/fondos/central6.png", "img/fondos/central7.png"); 
    var numimages=4;
    rndimg = new Array("img/fondos/central2.png", "img/fondos/central3.png", "img/fondos/central4.png", "img/fondos/central7.png"); 
    x=(Math.floor(Math.random()*numimages));
    randomimage=(rndimg[x]);
    document.getElementById("centralAdInicio").style.backgroundImage = "url("+ randomimage +")"; 
}



//function Menu(cual,imagen,subm){	
function Menu(subm){	
	//ocultaSub();
	document.getElementById(subm).style.visibility ="visible";
	document.getElementById(subm).style.display ="block";
	//cual.src=imagen	
}
function OcultaSub(subm2){
	document.getElementById(subm2).style.visibility ="hidden";
	document.getElementById(subm2).style.display ="none";
//	document.getElementById("subFirst").style.visibility ="hidden";
//	document.getElementById("sub2").style.visibility ="hidden";
//	document.getElementById("sub3").style.visibility ="hidden";
//	document.getElementById("sub4").style.visibility ="hidden";
//	document.getElementById("subLast").style.visibility ="hidden";
}



function displayYear() {
    var now = new Date();
//    var today = now.getDate();
//    var month = now.getMonth();
//    var monthName = new Array(12)
//        monthName[0]="01";
//        monthName[1]="02";
//        monthName[2]="03";
//        monthName[3]="04";
//        monthName[4]="05";
//        monthName[5]="06";
//        monthName[6]="07";
//        monthName[7]="08";
//        monthName[8]="09";
//        monthName[9]="10";
//        monthName[10]="11";
//        monthName[11]="12";
    var year2 = now.getFullYear();

    document.write(year2);
}




function css_browser_selector(u){var ua = u.toLowerCase(),is=function(t){return ua.indexOf(t)>-1;},g='gecko',w='webkit',s='safari',h=document.getElementsByTagName('html')[0],b=[(!(/opera|webtv/i.test(ua))&&/msie\s(\d)/.test(ua))?('ie ie'+RegExp.$1):is('firefox/2')?g+' ff2':is('firefox/3')?g+' ff3':is('gecko/')?g:/opera(\s|\/)(\d+)/.test(ua)?'opera opera'+RegExp.$2:is('konqueror')?'konqueror':is('chrome')?w+' '+s+' chrome':is('applewebkit/')?w+' '+s+(/version\/(\d+)/.test(ua)?' '+s+RegExp.$1:''):is('mozilla/')?g:'',is('j2me')?'mobile':is('iphone')?'iphone':is('ipod')?'ipod':is('mac')?'mac':is('darwin')?'mac':is('webtv')?'webtv':is('win')?'win':is('freebsd')?'freebsd':(is('x11')||is('linux'))?'linux':'','js']; c = b.join(' '); h.className += ' '+c; return c;}; css_browser_selector(navigator.userAgent); 

/*
        Internet Explorer - yellow 
        Internet Explorer 7 - orange 
        Gecko Engine on Windows (Firefox, Mozilla, Camino) - red 
        Gecko Engine on Linux (Firefox, Mozilla, Camino) - pink 
        Gecko Engine on Other OS (Firefox, Mozilla, Camino) - gray 
        Opera - green 
        Konqueror - blue 
        Safari - black 
        Chrome - cyan 

        <style type="text/css">
        .ie .example {
          background-color: yellow
        }
        .ie7 .example {
          background-color: orange
        }
        .gecko .example {
          background-color: gray
        }
        .win.gecko .example {
          background-color: red
        }
        .linux.gecko .example {
          background-color: pink
        }
        .opera .example {
          background-color: green
        }
        .konqueror .example {
          background-color: blue
        }
        .webkit .example {
          background-color: black
        }
        .example {
          width: 100px;
          height: 100px;
        }
        .no_js { display: block }
        .has_js { display: none }
        .js .no_js { display: none }
        .js .has_js { display: block }
        </style>
*/