Click image and get coordinates with Javascript

Emanuele Feronato Javascript

I had to display several photos where the user can click over an interesting point and have its coordinates passed through a form.
Of course, it was a bit more complicated, but this is the code i want to share with you.

Let’s assume we have a photo like this:

Try to click on a photo now…

You pointed on x = – y =

If you continue to click on the photo, you will see pointer changing its position, same thing with x and y coordinates

How can it be done?

You can try this script, obviously changing path and styles according to your needs

Tested both on Firefox and Explorer, it seems to work well.

Enjoy and give me feedback.

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Comments 101

  1. deller

    Hi,
    thank you for this nice example. It works just great in IE and Opera, but there are some strange problems with Firefox. Once I saw it worked on FF 1.5.0.7 well, but never again. Whenever I open this page (I mean your site, not my local tests) now using FF, pointer image just stuck in the left top corner of the background photo.

    I’m just wondering if this is some problem with my FF installation, or something else.

    BTW, it seems to be related to the “DOCTYPE” declaration, without it it works.

  2. Andreas

    great script – exactly what i needed this late night.

    I noticed however a funny feature:

    If you click anywhere and click exactly the same place again it goes to x=1 and Y=15

    But nevertheless – nice – very nice!

  3. Post
    Author
  4. Mahesh Sapkal

    Thanks for posting such a nice script. Found it very useful as i am working on such a part. Anyway thank you very much. Keep up the great work.

  5. Amit

    Doesn’t see to work on Firefox 2.0 (on OS X at least)

    I get the pointer once, but then it does not move again.

    Also the coordinates are relative to the page,not the image- is that the intention?

  6. a Noob

    Hi,
    Need help with a bug in this script. If you click on the same position twice, the pointer will jump up to the left corner (in IE). Any idea how to solve it?
    Grateful

  7. Vegard

    If you replace event.pageX and event.pageY with event.layerX and event.layerY in the Javascript, it should work in FF as well.

    (Tested OK in Opera 9.10 and FF1.5.09 and FF2.0.0.1 and IE6)

    :-)

  8. Frij

    No luck in FF 2.0 (on windows), even with the change to layerX. The top-left corner is always in the 300 range, which I imagine is because I have a navigation area on the left-hand side of the page that it’s picking up on. The y is about 15 off. :(

  9. vvk

    cool script I like it!
    Though i need only to know that mouse coordinates in JavaScript are conrolled by event.offsetX and event.offsetY properties. I’m a rookie in JavaSCript and simply do not know where to find this properties. I looked for a mouse methods and props (like ActionScript) but apparently found nothing.

    So thank you, once again!

  10. MayorSlack

    My search: click image coordinates (“the” Google)
    First hit here…. and it’s 100% what i was looking for!!!
    Great work, and as soon as i get my proj complete… i will buying that beer! 100% thanks!

  11. Farit

    The code for Mozilla doesn’t work.
    An excerpt from the code showing how to find pos_x and pos_y:

    function point_it(event)
    {
    var pointer_div = document.getElementById(“pointer_div”);

    //for IE
    if (window.ActiveXObject) {
    pos_x = window.event.offsetX;
    pos_y = window.event.offsetY;
    }
    //for Firefox
    else {
    var top = 0, left = 0;
    var elm = pointer_div;
    while (elm) {
    left = elm.offsetLeft;
    top = elm.offsetTop;
    elm = elm.offsetParent;
    }

    pos_x = event.pageX – left;
    pos_y = event.pageY – top;
    }

    etc.

  12. Stacy

    Thanks, this was extremely useful.

    As for the bug where clicking twice makes the coordinates jump up to the upper left corner, you must remember that the flag that says ‘you pointed here’ is another element. Clicking in the same place (right on top of it) fires the click event from that img instead of the overall pointer_div. I am just a noob, so take my code with a grain of salt, but here is how I solved the prob: http://pastebin.com/ffd901ae

    (That gives correct coordinates only, none of the other stuff is in there…)

    Does anyone know what doctype you CAN use with FF?

  13. Niraj Bhawnani

    The reason this does not work in Firefox 2.x is that the CSS attributes are being set wrongly. To set a CSS width/height/margin/padding/left/right/top/bottom property, you must specify pixels (px) or percentage (%). You cannot simply assign a number! IE is OK with just a number and assumes pixels though. Normally you set it like this:
    … {
    top: 200px;
    }

    in Javascript you set it like this:
    document.getElementById(‘myPointer’).style.top = ‘200px';

    The problem is the script is doing this:
    document.getElementById(“cross”).style.left = (pos_x-1);

    Notice there is no ‘px’.. the fix is simple:
    document.getElementById(“cross”).style.left = (pos_x-1).toString() ‘px';
    document.getElementById(“cross”).style.top = (pos_y-15).toString ‘px';

    Hope this helps!

  14. Danny Tipple

    As above but the complete working script in firefox/ie/opera is..

    function point_it(event){
    pos_x = event.offsetX?(event.offsetX):event.layerX-document.getElementById(“pointer_div”).offsetLeft;
    pos_y = event.offsetY?(event.offsetY):event.layerY-document.getElementById(“pointer_div”).offsetTop;
    document.getElementById(“cross”).style.left = (pos_x-20) “px” ;
    document.getElementById(“cross”).style.top = (pos_y-29) “px” ;
    document.getElementById(“cross”).style.visibility = “visible” ;
    document.pointform.form_x.value = pos_x;
    document.pointform.form_y.value = pos_y;
    }

  15. radek gasiorek

    Danny Tipple’s fx sollution has bug in while loop :
    it should be:
    while (elm) {
    left = elm.offsetLeft;
    top = elm.offsetTop;
    elm = elm.offsetParent;
    }

    so whole function is:

    function point_it(event){
    var pointer_div = document.getElementById(“pointer_div”);

    if (window.ActiveXObject) {
    pos_x = window.event.offsetX;
    pos_y = window.event.offsetY;
    }
    //for Firefox
    else {
    var top = 0, left = 0;
    var elm = pointer_div;
    while (elm) {
    left = elm.offsetLeft;
    top = elm.offsetTop;
    elm = elm.offsetParent;
    }

    pos_x = event.pageX – left;
    pos_y = event.pageY – top;
    }

    document.pointform.form_x.value = pos_x;
    document.pointform.form_y.value = pos_y;
    }

  16. Sam

    A correction to radek_gasiorek’s correction:

    while (elm) {
    left plus= elm.offsetLeft;
    top plus= elm.offsetTop;
    elm = elm.offsetParent;
    }

    note that the elm = elm.offsetParent is not a plus=.

    aside from the caveats, great script!

  17. Aviv23

    Ok
    first of all it worked in ff or IE or Opra
    I guess the standards have changed.

    The sum of offsets come handy only for the IE,
    Firefox returns the right location with page(X/Y) property of the event.

    To get the right “element” clicked in IE you need to use the srcElement property of the event (the target property in Firefox).

    That “element” will be used in the sum function – (while (elm) {//do} ).

    Then calculate the x,y coordinates clicked.

    The alter will be to use event.clientX and not event.offsetX for IE :
    x = event.clientX + document.body.scrollLeft + document.documentElement.scrollLeft;
    same for y (replace Left with Top).

    If code needed let me know here.

    I’ll check in next week.

  18. Julian

    Hi there,

    this should be the complete working source code for IE + FF

    unfortunately the pointer doesn´t appear anymore!
    does anybody know if there is a version like shawn described in the first post (http://www.shawngo.com/mappr/clicktest.html)??

    regards, Julian

    function point_it(event){
    var pointer_div = document.getElementById(“pointer_div”);

    if (window.ActiveXObject) {
    pos_x = window.event.offsetX;
    pos_y = window.event.offsetY;
    }
    //for Firefox
    else {
    var top = 0, left = 0;
    var elm = pointer_div;
    while (elm) {
    left = elm.offsetLeft;
    top = elm.offsetTop;
    elm = elm.offsetParent;
    }

    pos_x = event.pageX – left;
    pos_y = event.pageY – top;
    }

    document.pointform.form_x.value = pos_x;
    document.pointform.form_y.value = pos_y;
    }

    You pointed on x = – y =

  19. Catherine

    I was wondering if anyone has had any luck getting the pointer to appear with the latest code by Julian. I haven’t.

    Thanks.

  20. Grafficiane

    Is it possible to set picture’s top-left corner as the code’s reference top-left corner instead of page itself. Cause when you change picture’s position or if you have a different resolution coordinates will be different in this code…

  21. nicole

    Hey..I have been looking for something similar to this. I would actually like for the coordinates to be displayed in a stationary graphic when the user moves their mouse anywhere on the website. How could I adapt this code to do that?

  22. David Barker

    Hey there…

    Just tried this script on my site, and played with it a little to try and get it working right.

    It works fine in IE – the top left of the div I’m wanting to use with it comes up as 0,0. However, in Firefox, the top left of the div is like 380,267.
    In a perfect world, I could just subtract these values and make it 0,0 but obviously different screen resolutions etc will change it – I’ve also noticed that if I shrink my browser window so that the div gets closer to the left of the page (it’s centered right now), the ‘x’ coord shrinks too.

    I love the idea of this script but has anyone got any idea how to fix my dilema?? Again, it works perfectly in IE, but not in Firefox.

    Thanks!

    Dave

  23. Radek Wieszczyk

    Hello,

    Thanks a lot! I was trying to do something like this and almost surrended and then I’ve found Your solution!

    On Safari 3.1.1 in Mac OS X 10.4.11 works perfectly!

  24. Ret

    Hi, i have some problems when i try to insert more than 1 pointer:
    The second pointer div always appears out of the image, the x coordinate is correct but the y is y+image height.
    Cound you please help me?

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  26. Cheekyjinx

    Hello all,
    Firstly thank you to you for creating this script and thanks to everyone who has posted replies with minor fixes here and there on this script.

    I am wondering if a kind soul would enlighten me by posting their final version of this script which would allow me to put a href on the pointer image and not have the coordinates change when that is clicked on!
    It’s been puzzling me all night and at 2AM I’ve finally given in and had to ask!

    Thanks again everyone.
    Jinx

  27. Dan

    I had trouble getting this to work in newer browswers. Here is my solution

    function coord( e, image) {
    var posx = 0;
    var posy = 0;
    if (!e) var e = window.event;

    if (e.pageX || e.pageY) {
    posx = e.pageX;
    posy = e.pageY;
    }
    else if (e.clientX || e.clientY) {
    posx = event.offsetX;
    posy = event.offsetY;
    }

    if (image.x || image.y) {
    posx -= image.x;
    posy -= image.y;
    }
    theForm=document.aspnetForm;
    theForm.form_x.value=posx;
    theForm.form_y.value=posy;

    }

    You pointed on x = – y =

  28. ikod

    tested in IE7 and FF3

    if (window.ActiveXObject) {
    pos_x = window.event.offsetX;
    pos_y = window.event.offsetY;
    }else{
    // example FF
    var top = 0, left = 0;
    var elm = pointer_div;
    while (elm) {
    left = elm.offsetLeft + left;
    top = elm.offsetTop + top;
    elm = elm.offsetParent;
    }
    pos_x = event.pageX – left;
    pos_y = event.pageY – top;
    }

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  32. Anand

    Image Map Prototype

    function point_it(event)
    {
    var pos_x=0; /* this is required for IE */
    var pos_y=0; /* this is required for IE */
    var pointer_img = document.getElementById(“pointer_img”); /* pointer_img is an id of image tag or div tag as per your need */

    /****************** Rest of the code is same as per ikod ***************************/
    if (window.ActiveXObject)
    {
    pos_x = window.event.offsetX;
    pos_y = window.event.offsetY;
    }
    else
    {
    // example FF
    var top = 0, left = 0;
    var elm = pointer_img;
    while (elm) {
    left = elm.offsetLeft + left;
    top = elm.offsetTop + top;
    elm = elm.offsetParent;
    }
    pos_x = event.pageX – left;
    pos_y = event.pageY – top;
    }
    document.getElementById(“pos_x”).value = pos_x; /************* pos_x & pos_y is the id of the input tags *************/
    document.getElementById(“pos_y”).value = pos_y;
    }

    <!– –>

    x=
    y=

  33. Q-tech

    It seems there is a requirement for IE for this script to work – you must declare the event listener with the event parameter:

    If you ommit “event” in this declaration or use javascript to assign the handler like:
    document.getElementById(‘pointer-div’).onclick=point_it;
    IE will not pass the default “event” argument to the function and you will get undefined elements errors.
    Took me a while to figure that out, hope this helps someone…

  34. waldyd

    You don’t necessarily need any special script if you have your image as a submit button (type=”image”) on a form. The X and Y values are returned with the form submission – standard browser behaviour.

    html:

    “”

    myimage.x and myimage.y are returned. However, these are converted to myimage_x and myimage_y by PHP.

    PHP:
    echo ‘X:’.$_POST[“myimage_x”].’ Y:’.$_POST[“myimage_y”];

  35. tm

    I needed to find the location of X and Y whenever you click on any spot on the window. I am using the following script for this. It works on IE and FF.

    function clickedXY(event)
    {
    // for IE
    if (window.ActiveXObject)
    {
    pos_x = window.event.offsetX;
    pos_y = window.event.offsetY;
    }
    //for Firefox
    else
    {
    pos_x = event.pageX;
    pos_y = event.pageY;
    }
    str = “x=” + pos_x + ” y=” + pos_y + “\nlocation=” + document.location ;
    alert(str);
    }

  36. tm1

    I have added the capability to have the coordinates from the whole window registered or from specific areas on a window (one or more).

    function clickedXY(event, id)
    {
    if (window.ActiveXObject)
    {
    pos_x = window.event.offsetX;
    pos_y = window.event.offsetY;
    }
    else //for Firefox
    {
    pos_x = event.pageX;
    pos_y = event.pageY;
    }

    var rtn = "&id="+id;
    rtn += "&pos_x="+pos_x;
    rtn += "&pos_y="+pos_y;
    rtn += "&url="+document.location;
    alert(rtn);
    }

    <!-- -->

    Test section 1

    this is a test section
    entry for whatever
    you can think of.

    Test section 2

    this is a test section
    entry for whatever
    you can think of.

  37. Steve Alley

    I’m new to this. I copied your script into one of my pages. How do I actually connect that script with a picture I need to get the coordinates for?

    Thanks for understanding my learning curve.

  38. Biswomohan

    Hi,
    I need ur,help.
    I have an image of a counrty.which contains 113
    cities.From which I have to work on 78 cities.
    My requirement is like when I move the mouse to my 78 cites the mouse pointer became a hand and a pop up will caome with the city information.Can u suggest how to work on it?

  39. Jaykey

    Hi all,

    Thanks for the hot discussion and helps by providing your experience.
    I am wondering, how can we put such appliction to get control over a VLC Plugin/activex for getting coordinate of a running video.

    It will be helpful to control video on full screen without using other controls

  40. harini

    Really!!!
    Thank u so much!! I was searching for this code! You deserve to be appreciated!!Once again Thank u so much
    Your rating is 5*****

  41. Gopa

    Hi.. Nice article..

    Is it possible to display the image path on mouse click. E.g. on clicking the image or a link, it should display the actual image or file path and get the same copied to the clipboard. same as the case with copy shortcut in windows

  42. pThomas

    Thanks for the post, i’m using the x position returned as an array subscript to a javascript parameter passed to a bookmarking function. This saves a few lines of code (1 href instead of 12 and one image instead of 12 images) and allows me to put the js code in one external file for the hole site.

  43. Tomas

    Hello there,

    Thank you very much. Very helpful & useful. As for the pointer bug. Here is the solution:

    document.getElementById(“cross”).style.left = (pos_x-1).toString() + “px” ;
    document.getElementById(“cross”).style.top = (pos_y-15).toString() + “px”;

  44. Thomblin

    Thanks a lot, helped me very much, but I used the version of Farit (on July 14, 2007 at 11:51 pm) like this

    var pos_x = 0;
    var pos_y = 0;
    function get_click_coords(event)
    {
    var pointer_div = document.getElementById(‘captcha’);

    // IE
    if (window.ActiveXObject)
    {
    pos_x = window.event.offsetX;
    pos_y = window.event.offsetY;
    }
    // Firefox
    else
    {
    var top = 0, left = 0;
    var elm = pointer_div;
    while (elm)
    {
    left += elm.offsetLeft;
    top += elm.offsetTop;
    elm = elm.offsetParent;
    }

    pos_x = event.pageX – left;
    pos_y = event.pageY – top;
    }
    }

  45. Jessica

    Great this posting…!
    But I have Problem,
    how about if i show the image in
    div pan tag that has resolution 500×500 pixel in style.css
    the image has resolution 800×800
    so the image just show in 500×500
    but it can move to right, left up and down with pan control.

    the problem is
    when i click image just show coordinates in max 500×500
    but the image has resolution 800×800
    has any ideas??

    You pointed on x = – y =

    and style.css
    #pan :{
    border: #dddddd 1px solid;
    width: 500px;
    height: 500px;
    overflow: hidden;
    }

    the code is work but the coordinates
    X and Y is just in div pan with max 500×500 pixel

  46. ben martinez

    Hi, sorry for being a little novice in this, but if I have my website, where do I place this code, and also the image? many thanks

  47. Bruno

    Hi.

    What can I do if I want to get the coords of two different points? If I duplicate the sstarting scriot, it won’t work correctly.
    Moreover, I’ d like to catch the distance in mm between the points?
    Any ideas?

    Kind Regards

  48. paria

    Well done Emanuele!
    You generously solve my problem and I just want to thank you for sharing this code. Thank you, thank you and again thank you! And thanks Shawn too.
    Kind Regards

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