1 files changed, 60 insertions, 0 deletions
diff --git a/phpfspot.js b/phpfspot.js
index 74ad4b9..d8290ad 100644
--- a/phpfspot.js
+++ b/phpfspot.js
@@ -13,6 +13,11 @@ function showImage(id, scrollup)
    if(scrollup != undefined) {
       window.scrollTo(0,0);
    }
+
+   /* delete some global vars */
+   delete(origHeight);
+   delete(origWidth);
+   delete(photo_details_pos);
 }
 
 function moveToThumb(thumb_id)
@@ -249,6 +254,58 @@ function getPhotoToShow()
    return photo_to_show;
 }
 
+function zoom(mod)
+{
+   if(mod == undefined)
+      return;
+
+   if(photo = document.getElementById('photo')) {
+
+      if(origWidth == undefined)
+         origWidth = photo.width;
+      if(origHeight == undefined)
+         origHeight = photo.height;
+
+      if(mod != 0) {
+         new_w = photo.width * (1 + mod/100);
+         new_h = photo.height * (1 + mod/100);
+         photo.width = new_w;
+         photo.height = new_h;
+
+         if(photo_details_pos == undefined) {
+            photo_details_pos = document.getElementById('photo_details').offsetLeft;
+         }
+
+         if((photo.offsetLeft + new_w) >= photo_details_pos-20) {
+            hidePhotoDetails('true');
+         }
+         else {
+            hidePhotoDetails('false');
+         }
+      }
+      else {
+         photo.width = origWidth;
+         photo.height = origHeight;
+         hidePhotoDetails('false');
+      }
+   }
+
+} // zoom()
+
+function hidePhotoDetails(mode)
+{
+   if(photo_details = document.getElementById('photo_details')) {
+      if(mode == 'true') {
+         photo_details.style.visibility = 'hidden';
+         photo_details.style.display = 'none';
+      }
+      else {
+         photo_details.style.visibility = 'visible';
+         photo_details.style.display = 'inline';
+      }
+   }
+} // hidePhotoDetails()
+
 function showCalendar(date_box, click_obj)
 {
    var calendar = document.getElementById('calendar');
@@ -509,3 +566,6 @@ var autobrowse = 0;
 var sliding = 0;
 var sliding_paused = 0;
 var sliding_time = 3;
+var origHeight;
+var origWidth;
+var photo_details_pos;