change element tag javascript code example

Example 1: javascript change element id

var element = document.getElementById("oldID");
element.id = "newID";

Example 2: javascript set header text

var headingDiv       = document.getElementById("head");
headingDiv.innerHTML = "<H3>Public Offers</H3>";

//Or with jQuery
$(".head h3").html("your new header");

Example 3: how to change html element in javascript

document.getElementbyid.innerHTML = "text";