JS Selected Text

script.js

$('.element').on('mouseup', function(event){
    var selection;

    if (window.getSelection) {
        selection = window.getSelection();
    } else if (document.selection) {
        selection = document.selection.createRange();
    }

    selection.toString() !== '' && alert('"' + selection.toString() + '" was selected at ' + event.pageX + '/' + event.pageY); 
});