// Get the element, add a click listener...
   
document.getElementById("parent-list").addEventListener("click",function(e)
{
        // e.target is the clicked element!
        // If it was a list item
        if(e.target && e.target.nodeName == "LI") {
            // List item found!  Output the ID!
            console.log("List item ",e.target.id.replace("post-"),"
was clicked!");
        }
    });