var submenu = '';
        var timer;
        var myFx;
        function menu()
        {
            myFx = new Fx.Tween('header_sub');
	        $('alquiler').addEvent('mouseover', function(e){
		        e.stop();
		        if (submenu != 'alquiler'){
		            $('alquiler_sub').setStyle('height',50);
		            $('venta_sub').setStyle('height',0);
                    myFx.start('height', '50px');
                    submenu = 'alquiler';
                    $$('div#main_nav a').each(function(el){
                        el.removeClass('current');
                    });
                    $('alquiler').addClass('current');
                    clearTimeout(timer);
                    timer = setTimeout("clearsubmenu();",4000);
                }   
	        });
	        $('venta').addEvent('mouseover', function(e){
		        e.stop();
		        if (submenu != 'venta'){
		            $('alquiler_sub').setStyle('height',0);
		            $('venta_sub').setStyle('height',50);
                    myFx.start('height', '50px');
                    submenu = 'venta';
                    $$('div#main_nav a').each(function(el){
                        el.removeClass('current');
                    });
                    $('venta').addClass('current');
                    clearTimeout(timer);
                    timer = setTimeout("clearsubmenu();",4000);
                }   
	        });
	        $('contacto').addEvent('mouseover', function(e){
		        e.stop();
		        if (submenu != ''){
                    $$('div#main_nav a').each(function(el){
                        el.removeClass('current');
                    });
                    myFx.start('height', '0px');
                    submenu = '';
                }   
	        });
	        $('inicio').addEvent('mouseover', function(e){
		        e.stop();
		        if (submenu != ''){
                    $$('div#main_nav a').each(function(el){
                        el.removeClass('current');
                    });
                    myFx.start('height', '0px');
                    submenu = '';
                }   
	        });
	        $('nosotros').addEvent('mouseover', function(e){
		        e.stop();
		        if (submenu != ''){
                    $$('div#main_nav a').each(function(el){
                        el.removeClass('current');
                    });
                    myFx.start('height', '0px');
                    submenu = '';
                }   
	        });
	        $('header_sub').addEvent('mouseover', function(e){
		        e.stop();
		        if (submenu != ''){
                    clearTimeout(timer);
                }   
	        });
	        $('header_sub').addEvent('mouseout', function(e){
		        e.stop();
		        if (submenu != ''){
                    $$('div#main_nav a').each(function(el){
                        el.removeClass('current');
                    });
                    timer = setTimeout("clearsubmenu();",4000);
                }   
	        });
        }
        function clearsubmenu(){
            myFx.start('height', '0px');
            submenu = '';
        }
        
        var imgs = new Array(), current=0;
        
        function rotate_banner()
        {
            var elementDIV = $('default_banner');
            imgs = elementDIV.getElements('img.slide');
            imgs.each(function(el){
                el.setOpacity(0);
            })

            imgs[current].fade(1);
	        setTimeout(xfade,4000);
        }

        function xfade()
        {
	        nIndex = imgs[current+1]?current+1:0;
	        imgs[current].fade(0);
	        imgs[nIndex].set('tween', {transition: Fx.Transitions.Sine.easeOut,duration: 2000});
	        imgs[nIndex].tween('opacity', 1);
	        current = nIndex;
	        setTimeout(xfade,4000);
        }