var progressBar = new Class({
							initialize: function(destino){
							  this.destino = destino;
							  //alert(this.destino.getCoordinates());
							  var tam = this.destino.getCoordinates();
							  this.MyBarra=new Element('div',{
							        'class':'barracarga',
									'styles':{
										width: tam.width,
										height:tam.height,																
										position:'absolute',
										opacity : 0													
									}
								});
								//.setHTML(' ');
								//alert(this.MyBarra)
							},
							
							mostrar: function(){
								this.destino.adopt(this.MyBarra);						   	
								var pos = this.destino.getCoordinates();	
								this.MyBarra.setStyle('z-index','99');
								this.MyBarra.setStyles({
									top: pos.top,
									left: pos.left,
									opacity: 0.6
								});			
							},
							
							ocultar: function(){
								this.MyBarra.setStyle('opacity','0');
								this.MyBarra.remove();				
							}
						})