change div background color on shift + click (javascript)?

Question

I already have onclick event for changing border color of a div on mouse click.

I want to be able to change background color separately on shift + click, without changing border colors.

How to achieve this?

edit:

the current code for multiple clicks and shift+click:

<script> 
var linkClick = 1; 
  function update_x(obj){ 
  if (linkClick == 1){obj.style.border = 'solid 1px #eeeeee';};
  if (linkClick == 2){obj.style.border = 'solid 1px red'};
  if (linkClick == 3){obj.style.border = 'solid 1px rgba(50, 255, 50, 1)'};
  if (linkClick == 4){obj.style.border = 'solid 1px rgba(70, 180, 255, 1)'};
  if (linkClick == 5){obj.style.border = 'solid 1px yellow'};
  if (linkClick >5 ) {obj.style.border = 'solid 1px #555555'; linkClick=0};
  linkClick++; 
}
</script>
<script>
function changeDivColor (event) {
    event = event || window.event;
    var myDiv = document.getElementById("b14")
    if (event.shiftKey == true) {
        myDiv.style.backgroundColor = "blue";  
    }
}
window.onload = function () {
    document.getElementById("b14").onclick = function (event) {
        changeDivColor (event);
        update_x(this);
    }
}
</script>

edit2 - solved by Jeffman

Answer 1

In your onclick , make sure you refer to the event , eg if you're using an attribute:

<div onclick="clickHandler(event);" ... >

or if you're assigning it later:

divElement.onclick = function(event) {
    event = event || window.event; // Support for older IE
    // ...
};

or if you're really using addEventListener and just said onclick as a kind of shorthand:

divelement.addEventListener("click", function(event) {
    // ...
}, false);

Then you can refer to the event.shiftKey flag to tell whether Shift is down.

Live Example | Live Source

More in the spec .

Answer 2

Latest code. See it work here: http://jsfiddle.net/jeffman/Y3QET/

var linkClick = 1; 
function update_x(obj) { 
    if (linkClick == 1){obj.style.border = 'solid 1px #eeeeee';};
    if (linkClick == 2){obj.style.border = 'solid 1px red'};
    if (linkClick == 3){obj.style.border = 'solid 1px rgba(50, 255, 50, 1)'};
    if (linkClick == 4){obj.style.border = 'solid 1px rgba(70, 180, 255, 1)'};
    if (linkClick == 5){obj.style.border = 'solid 1px yellow'};
    if (linkClick >5 ) {obj.style.border = 'solid 1px #555555'; linkClick=0};
    linkClick++; 
}

function changeDivColor (el, event) {
    if (event.shiftKey == true) {
        el.style.backgroundColor = "blue";  
    }
}
window.onload = function () {
    var i = 1, len = 5; // len is the number of elements using the b1 id pattern
    for (i; i <= len; i++) {
        document.getElementById("b" + i).onclick = function (event) {
            event = event || window.event;
            changeDivColor (this, event);
            update_x(this); // or whatever your other function is.
        }
    }
}

Answer 3

Javascript.net在http://www.javascripter.net/faq/ctrl_alt.htm上有关于如何做你需要的解释