Disable text selection on website by using javascript

Sometimes you may need to disable text selection of an HTML page. It is very easy way how you can do it. Below is the source codes:

        function disableText(e) {
            return false;
        }
        function reEnable() {
            return true;
        }
        //For browser IE4+
        document.onselectstart = new Function("return false");

        //For browser NS6
        if (window.sidebar) {
            document.onmousedown = disableText;
            document.onclick = reEnable;
        }
    

Just copy the above JavaScript codes into your page under head section. Then whatever you write in your page everything will show in read-only mode.

Update:
Add following code to disable text selection on any key pressed:

        window.onkeydown = disableText;
        

Add following code to disable text selection on ctrl key pressed:

        window.onkeydown = function(e){
           if(e.ctrlKey == true){
              return false;
           }
        };