-- function refreshLikesCount(petkey,idFollow){
	alert("pepe");
	$.ajax({
			 url: "<?php echo $GLOBALS["baseURL"];?>crud.php?view=lista-peticiones&action=likePetition&act=like&petitionKey"+petkey,
			 //data: { view:"lista-peticiones",action:"likePetition",act:"like",petitionKey:petkey,decoded:"false"},
			 type: "POST",
			 dataType: "json",
			 timeout:10000,
			 error: function(XMLHttpRequest, textStatus, errorThrown){
			   //alert(errorThrown);
			 },
			success: function(data){
			alert("success");
				$('#number'+idFollow).click(function(){

					$(this).append(data.likescount);
				});

			 }
		});
}

-----------------
<a class = "follow" OnClick= "refreshLikesCount('<?php $petition->key;?>','<?php echo $count;?>');">&nbsp;&nbsp;&nbsp;</a>