function showBox(){
    if(document.getElementById('cargaVideo') != undefined) {
       $('cargaVideo').hide();    
    }   
    $('overlay').show();
    center('box');    
    //return false;    
}

function hideBox(){
    $('box').hide();
    $('overlay').hide();
    if(document.getElementById('cargaVideo') != undefined) {
       $('cargaVideo').show();
    }    
    //return false;
}

function center(element){
    try{
        element = $(element);
    }catch(e){
        return;
    }

    var my_width  = 0;
    var my_height = 0;

    if ( typeof( window.innerWidth ) == 'number' ){        
        my_width  = window.innerWidth;
        my_height = window.innerHeight;
    }else if ( document.documentElement &&
             ( document.documentElement.clientWidth ||
               document.documentElement.clientHeight ) ){
        my_width  = document.documentElement.clientWidth;
        my_height = document.documentElement.clientHeight;
    }
    else if ( document.body &&
            ( document.body.clientWidth || document.body.clientHeight ) ){
        my_width  = document.body.clientWidth;
        my_height = document.body.clientHeight;
    }

    element.style.position = 'absolute';
    element.style.zIndex   = 99;

    var scrollY = 0;

    if ( document.documentElement && document.documentElement.scrollTop ){
        scrollY = document.documentElement.scrollTop;
    }else if ( document.body && document.body.scrollTop ){
        scrollY = document.body.scrollTop;
    }else if ( window.pageYOffset ){
        scrollY = window.pageYOffset;
    }else if ( window.scrollY ){
        scrollY = window.scrollY;
    }

    var elementDimensions = Element.getDimensions(element);

    
    var setX = ( my_width  - elementDimensions.width  ) / 2;
    var setY = ( my_height - elementDimensions.height ) / 2 + scrollY;
		
    setX = ( setX < 0 ) ? 0 : setX;
    setY = ( setY < 0 ) ? 0 : setY;

    element.style.left = setX + "px";
    element.style.top  = 120 + "px";    
    $('box').show();    
}

function reposicionar() {
	var offx = findPosX(document.getElementById('referencia'));
	var offy = findPosY(document.getElementById('referencia'));
	document.getElementById('botella').style.left = offx-75 + 'px';	
}