$(function() {

$("ul#botonera li.btn_01 a").hover(function() {
	// on mouse over
	        $(this).animate({backgroundPosition: '-149px 0px'}, "fast")
	},
	// on mouse out
	function() {

		if($(this).attr('class')!= 'current') {
	        $(this).animate({backgroundPosition: '0px 0px'})
		}
	});
	
$("ul#botonera li.btn_02 a").hover(function() {
	// on mouse over
	        $(this).animate({backgroundPosition: '-447px 0px'}, "fast")
	},
	// on mouse out
	function() {
	
		if($(this).attr('class')!= 'current') {
	        $(this).animate({backgroundPosition: '-298px 0px'})
		}
	});
	
$("ul#botonera li.btn_03 a").hover(function() {
	// on mouse over
	        $(this).animate({backgroundPosition: '-745px 0px'}, "fast")
	},
	// on mouse out
	function() {
		if($(this).attr('class')!= 'current') {
	        $(this).animate({backgroundPosition: '-596px 0px'})
	   }
	});
	
$("ul#botonera li.btn_04 a").hover(function() {
	// on mouse over
	        $(this).animate({backgroundPosition: '-1043px 0px'}, "fast")
	},
	// on mouse out
	function() {
		if($(this).attr('class')!= 'current') {
	        $(this).animate({backgroundPosition: '-894px 0px'})
	   }
	});
	
$("ul#botonera li.btn_05 a").hover(function() {
	// on mouse over
	        $(this).animate({backgroundPosition: '-1341px 0px'}, "fast")
	},
	// on mouse out
	function() {
		if($(this).attr('class')!= 'current') {
	        $(this).animate({backgroundPosition: '-1191px 0px'})
	   }
	});

});