Open popup to share facebook/twitter

popup.js

$( '.popup' ).on( "click", function( e ) {

    e.preventDefault();

    var width  = 575,
        height = 400,
        left   = ( window.screen.width / 2 ) - ( ( width / 2 ) + 10 ),
        top    = ( window.screen.height / 2 ) - (( height / 2 ) + 50 ),
        url    = this.href,
        opts   = 'status=1' +
                 ',width='  + width  +
                 ',height=' + height +
                 ',top='    + top    +
                 ',left='   + left;
        
    window.open( url, 'twitter', opts );
} );
    
// <a href="http://twitter.com/intent/tweet?text=Rutina%20de%20hombro%20y%20trapecio%2C%20por%20Mauricio%20Garza.&amp;url=http://www.sololosmasfuertes.com/" target="_blank" title="Compartir en Twitter" class="popup"></a>