Check which of the buttons was “click” eventListener

Question

    var one= document.getElementById("OneOp");
    one.addEventListener("click",function1,false);

    var two= document.getElementById("twoOp");
    two.addEventListener("click", function1,false);

    var three= document.getElementById("threeOp");
    three.addEventListener("click", function1,false);

all of them go to fucntion1, once the I need to know which button, and then use than in information in function1, (out of one two or three). if there any way to do check it? I was thinking implementing a if else statement of some kind, but I can't seem to figure out the right sintax using javascript.

I am very new at javascript, I would appreciate any input.

thanks in advance.

Answer 1

Use the target property of the event object

function function1(event){
    var clickedId = event.target.id;
    if(clickedId == 'OneOp'){
    }
    else if
    .
    .
    .
}