Redesign buttons + add previous button to tooltip buttons

Author: afshinm

intro.js

@@ -253,27 +253,41 @@
       tooltipLayer.appendChild(arrowLayer);
       helperLayer.appendChild(tooltipLayer);
 
-      var skipTooltipButton = document.createElement("a");
-      skipTooltipButton.className = "introjs-skipbutton";
-      skipTooltipButton.href = "javascript:void(0);";
-      skipTooltipButton.innerHTML = "Skip";
-
+      //next button
       var nextTooltipButton = document.createElement("a");
 
       nextTooltipButton.onclick = function() {
         _nextStep.call(self);
       };
 
-      nextTooltipButton.className = "introjs-nextbutton";
+      nextTooltipButton.className = "introjs-button introjs-nextbutton";
       nextTooltipButton.href = "javascript:void(0);";
       nextTooltipButton.innerHTML = "Next →";
 
+      //previous button
+      var prevTooltipButton = document.createElement("a");
+
+      prevTooltipButton.onclick = function() {
+        _previousStep.call(self);
+      };
+
+      prevTooltipButton.className = "introjs-button introjs-prevbutton";
+      prevTooltipButton.href = "javascript:void(0);";
+      prevTooltipButton.innerHTML = "← Back";
+
+      //skip button
+      var skipTooltipButton = document.createElement("a");
+      skipTooltipButton.className = "introjs-button introjs-skipbutton";
+      skipTooltipButton.href = "javascript:void(0);";
+      skipTooltipButton.innerHTML = "Skip";
+
       skipTooltipButton.onclick = function() {
         _exitIntro.call(self, self._targetElement);
       };
 
       var tooltipButtonsLayer = tooltipLayer.querySelector('.introjs-tooltipbuttons');
       tooltipButtonsLayer.appendChild(skipTooltipButton);
+      tooltipButtonsLayer.appendChild(prevTooltipButton);
       tooltipButtonsLayer.appendChild(nextTooltipButton);
 
       //set proper position

introjs.css

@@ -111,17 +111,75 @@
 }
 
 .introjs-tooltipbuttons {
-  font-size: 10px;
   text-align: right;
 }
 
-.introjs-tooltipbuttons .introjs-skipbutton {
+.introjs-button {
+  position: relative;
+  overflow: visible;
+  display: inline-block;
+  padding: 0.3em 0.8em;
+  border: 1px solid #d4d4d4;
+  margin: 0;
+  text-decoration: none;
+  text-shadow: 1px 1px 0 #fff;
+  font: 11px/normal sans-serif;
+  color: #333;
+  white-space: nowrap;
+  cursor: pointer;
+  outline: none;
+  background-color: #ececec;
+  background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#f4f4f4), to(#ececec));
+  background-image: -moz-linear-gradient(#f4f4f4, #ececec);
+  background-image: -o-linear-gradient(#f4f4f4, #ececec);
+  background-image: linear-gradient(#f4f4f4, #ececec);
+  -webkit-background-clip: padding;
+  -moz-background-clip: padding;
+  -o-background-clip: padding-box;
+  /*background-clip: padding-box;*/ /* commented out due to Opera 11.10 bug */
+  -webkit-border-radius: 0.2em;
+  -moz-border-radius: 0.2em;
+  border-radius: 0.2em;
+  /* IE hacks */
+  zoom: 1;
+  *display: inline;
+  margin-top: 10px;
+}
+
+.introjs-button:hover {
+  border-color: #bcbcbc;
+  text-decoration: none; 
+  box-shadow: 0px 1px 1px #e3e3e3;
+}
+
+.introjs-button:focus,
+.introjs-button:active {
+  background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#ececec), to(#f4f4f4));
+  background-image: -moz-linear-gradient(#ececec, #f4f4f4);
+  background-image: -o-linear-gradient(#ececec, #f4f4f4);
+  background-image: linear-gradient(#ececec, #f4f4f4);
+}
+
+/* overrides extra padding on button elements in Firefox */
+.introjs-button::-moz-focus-inner {
+  padding: 0;
+  border: 0;
+}
+
+.introjs-skipbutton {
   margin-right: 5px;
-  color: gray;
+  color: #7a7a7a;
 }
 
-.introjs-tooltipbuttons .introjs-nextbutton {
-  font-size: 11px;
-  font-weight: bold;
-  color: #2071d3;
+.introjs-prevbutton {
+  -webkit-border-radius: 0.2em 0 0 0.2em;
+  -moz-border-radius: 0.2em 0 0 0.2em;
+  border-radius: 0.2em 0 0 0.2em;
+  border-right: none;
+}
+
+.introjs-nextbutton {
+  -webkit-border-radius: 0 0.2em 0.2em 0;
+  -moz-border-radius: 0 0.2em 0.2em 0;
+  border-radius: 0 0.2em 0.2em 0;
 }