How to disable highlight on a image

Question

Use user-select property:

img{
    -khtml-user-select: none;
    -o-user-select: none;
    -moz-user-select: none;
    -webkit-user-select: none;
    user-select: none;
}

You can try this (this won't work in all browsers):

img::-moz-selection {
    background-color: transparent;
    color: #000;
}

img::selection {
    background-color: transparent;
    color: #000;
}

Or you can use a <div> with the appropriate width and height set and use a CSS background image on it. For example I use this on my site:

<div id="header"></div>

#header {
    height: 79px;
    width: 401px;
    background: url(http://nclabs.org/images/header.png) no-repeat;
}

And finally you can use Javascript to programatically disable it.

img {
    -khtml-user-select: none;
    -o-user-select: none;
    -moz-user-select: none;
    -webkit-user-select: none;
    user-select: none;
}

Try to put it as a css background instead of an img element.

This disabled highlighting on a DOM element:

function disableSelection(target){
    if (typeof target.onselectstart!="undefined") // if IE
        target.onselectstart=function(){return false}
    else if (typeof target.style.MozUserSelect!="undefined") // if Firefox
        target.style.MozUserSelect="none";
    else // others
        target.onmousedown=function(){return false;}

    target.style.cursor = "default";
}

Use it like this:

disableSelection(document.getElementById("my_image"));

img{
   -ms-user-select: none;      /* IE 10+ */
   -moz-user-select: none;     /* Firefox all */
   -webkit-user-select: none;  /* Chrome all / Safari all */
   user-select: none;          /* Likely future */      
}