Automatically add Pinterest pin overlays to Wordpress blog images. This should eventually be turned into a plugin probably.

wp_pinterest_hovers.js

/**
 * Pinterest Overlay Code
 * @require jQuery 1.8
 */

var bs_pinButtonURL = "//link.to/image.png";
var bs_pinButtonHeight = 72;
var bs_pinButtonWidth = 72;
var bs_yourUrl = $(location).attr('host');
var bs_pinButtonPos = "bottomright";
var bs_pinPrefix = "";
var bs_pinSuffix = "";

jQuery(document).ready(function ($) {
  $('body').append('<img style="visibility:hidden;" class="pinimgload" src="' + bs_pinButtonURL + '" >');
  $('#bs_pinOnHover').hide();
  var l;
  var m = bs_pinButtonHeight;
  var n = bs_pinButtonWidth;

  hoverCheck();

  function hoverCheck() {
    $('.blog-entry-content img,.entry-content img').not('.nopin,.nopin img').mouseenter(function () {
      $('.pinit-wrapper').css("visibility", "hidden");
      clearTimeout(l);
      var a = $(this);
      var b = parseInt(a.css("margin-top"), 16);
      var c = parseInt(a.css("margin-left"), 16);
      var d;
      var e;
      switch (bs_pinButtonPos) {
        case 'bottomright':
          d = a.position().top + b + a.outerHeight() - n - 5;
          e = a.position().left + c + a.outerWidth() - m - 5;
          break;
        default:
          d = a.position().top + b + a.outerHeight() - n - 5;
          e = a.position().left + c + a.outerWidth() - m - 5;
          break;
      }
      var f = a.attr('src');
      var g = a.closest('.post,.hentry,.entry').find('.post-title,.entry-title,.entry-header');
      var h = g.text().replace(/^\s+|\s+$/g,'');
      if (typeof bs_pinPrefix === 'undefined') {
        bs_pinPrefix = '';
      }
      if (typeof bs_pinSuffix === 'undefined') {
        bs_pinSuffix = '';
      }
      pinitURL = "http://" + bs_yourUrl;
      var i = '<div class=" pinit-wrapper" style="display:none;position: absolute;z-index: 9999; cursor: pointer; heigth: '+m+'px; width: '+n+'px;" ><a href="//pinterest.com/pin/create/button?url=' + pinitURL + '&media=' + f + '&description=' + bs_pinPrefix + h + bs_pinSuffix + '" style="display:block;outline:none;" target="_blank"><img class="pinimg" style="-moz-box-shadow:none;-webkit-box-shadow:none;-o-box-shadow:none;box-shadow:none;background:transparent;margin: 0;padding: 0;border:0;" src="' + bs_pinButtonURL + '" title="Pin on Pinterest" height="'+m+'" width="'+n+'"></a></div>';
      var j = a.parent().is('a') ? a.parent() : a;
      if (!j.next().hasClass('pinit-wrapper')) {
        j.after(i);
        if (typeof l === 'undefined') {
          j.next('.pinit-wrapper').attr("onmouseover", "this.style.opacity=1;this.style.visibility='visible'");
        } else {
          j.next('.pinit-wrapper').attr("onmouseover", "this.style.opacity=1;this.style.visibility='visible';clearTimeout(bsButtonHover)");
        }
      }
      var k = j.next(".pinit-wrapper");
      k.css({
        "top": d,
        "left": e
      });
      k.css("visibility", "visible");
      k.stop().fadeTo(300, 1.0, function () {
        $(this).show();
      });
    });

    $('.blog-entry-content img,.entry-content img').on('mouseleave', function () {
      if ($.browser.msie) {
        var a = $(this).next('.pinit-wrapper');
        var b = $(this).parent('a').next('.pinit-wrapper');
        l = setTimeout(function () {
          a.stop().css("visibility", "hidden");
          b.stop().css("visibility", "hidden");
        }, 3000);
      } else {
        $('.pinit-wrapper').stop().fadeTo(0, 0.0);
      }
    });
  }
});