Answers for "change value of span item jquery"

set value in span using jquery

//set value in span using jquery
$("#idname").text("your value");

//set value in span using Javascript
document.getElementById("idname").textContent="Your value";
document.getElementById("message").innerHTML="your value";

span change jquery

$(document).ready(function(){
    $("#span1").on('DOMSubtreeModified',function(){
         // text change handler
     });

 });