function grayOut(vis, options) {
  // Pass true to gray out screen, false to ungray
  // options are optional.  This is a JSON object with the following (optional) properties
  // opacity:0-100         // Lower number = less grayout higher = more of a blackout 
  // zindex: #             // HTML elements with a higher zindex appear on top of the gray out
  // bgcolor: (#xxxxxx)    // Standard RGB Hex color code
  // grayOut(true, {'zindex':'50', 'bgcolor':'#0000FF', 'opacity':'70'});
  // Because options is JSON opacity/zindex/bgcolor are all optional and can appear
  // in any order.  Pass only the properties you need to set.
  var options = options || {}; 
  var zindex = options.zindex || 50;
  var opacity = options.opacity || 40;
  var opaque = (opacity / 100);
  var bgcolor = options.bgcolor || '#000000';
  var dark=document.getElementById('darkenScreenObject');
  if (!dark) {
    // The dark layer doesn't exist, it's never been created.  So we'll
    // create it here and apply some basic styles.
    // If you are getting errors in IE see: http://support.microsoft.com/default.aspx/kb/927917
    var tbody = document.getElementsByTagName("body")[0];
    var tnode = document.createElement('div');           // Create the layer.
        tnode.style.position='absolute';                 // Position absolutely
        tnode.style.top='0px';                           // In the top
        tnode.style.left='0px';                          // Left corner of the page
        tnode.style.overflow='hidden';                   // Try to avoid making scroll bars            
        tnode.style.display='none';                      // Start out Hidden
        tnode.id='darkenScreenObject';                   // Name it so we can find it later
    tbody.appendChild(tnode);                            // Add it to the web page
    dark=document.getElementById('darkenScreenObject');  // Get the object.
  }
  if (vis) {
    // Calculate the page width and height 
    if( document.body && ( document.body.scrollWidth || document.body.scrollHeight ) ) {
        var pageWidth = document.body.scrollWidth+'px';
        var pageHeight = document.body.scrollHeight+'px';
    } else if( document.body.offsetWidth ) {
      var pageWidth = document.body.offsetWidth+'px';
      var pageHeight = document.body.offsetHeight+'px';
    } else {
       var pageWidth='100%';
       var pageHeight='100%';
    }   
    //set the shader to cover the entire page and make it visible.
    dark.style.opacity=opaque;                      
    dark.style.MozOpacity=opaque;                   
    dark.style.filter='alpha(opacity='+opacity+')'; 
    dark.style.zIndex=zindex;        
    dark.style.backgroundColor=bgcolor;  
    dark.style.width= pageWidth;
    dark.style.height= pageHeight;
    dark.style.display='block';                          
  } else {
     dark.style.display='none';
  }
}

function Load(bLoad, oImgLoading, options){
	
	var divLoader=document.getElementById('divLoader');

	if (!divLoader) {
		var options = options || {}; 
		var posVertical = options.posVertical || 50;		
		var posHorizontal = options.posHorizontal || 10;

		var tbody = document.getElementsByTagName("body")[0];
		var tnode = document.createElement('div');       // Create the layer.
        tnode.style.position='absolute';                 // Position absolutely
        tnode.style.top= posVertical;                    // In the top
        tnode.style.left= posHorizontal;                 // Left corner of the page
        tnode.style.overflow='hidden';                   // Try to avoid making scroll bars            
        tnode.style.display='none';                      // Start out Hidden
		tnode.style.zIndex=100;
		tnode.innerHTML='<img src=' + oImgLoading + '>'; // Start out Hidden	
		tnode.id='divLoader';                            // Name it so we can find it later
		tbody.appendChild(tnode);                        // Add it to the web page
		divLoader=document.getElementById('divLoader');  // Get the object.
	} else {
	    var posVertical = options.posVertical || 50;		
		var posHorizontal = options.posHorizontal || 10;
		
	    divLoader.style.top= posVertical;
	    divLoader.style.left= posHorizontal;
	}

	if (bLoad)
	{
		divLoader.style.display ="block"
	}else{
	    
		divLoader.style.display ="none"		
	}
	grayOut(bLoad, options);
	
}

function CalcularPosicionLoading() {
    
     var targetX = (document.all)?document.body.scrollTop:window.pageYOffset;
     var x = targetX == 0 ? '255' : (targetX + 300).toString();
     var Position;
         Position = {posVertical: x, posHorizontal: '520'} 
    return Position;
}