diff --git a/contrib/js/backlink.js b/contrib/js/backlink.js
index e3c6b6e..f8bb3ba 100644
--- a/contrib/js/backlink.js
+++ b/contrib/js/backlink.js
@@ -279,7 +279,7 @@ function init(prefix) {
   e.addEventListener("dragend", function(ev) {
     var x = originalX + ev.clientX - mouseDownX;
     var y = originalY + ev.clientY - mouseDownY;
-    x = window.screenX - x;
+    x = window.screenLeft - x;
     rpl.moveTo(x, y);
     originalX = x;
     originalY = y;
diff --git a/contrib/static/nntpchan.js b/contrib/static/nntpchan.js
index e6c9a34..5b1e86b 100644
--- a/contrib/static/nntpchan.js
+++ b/contrib/static/nntpchan.js
@@ -38,7 +38,7 @@ parent.appendChild(wrapper);parent.backlink=false;},function(msg){var wrapper=do
 parent.backlink=true;}};parent.backlink=true;}
 function inject_hover_for_element(elem){var elems=elem.getElementsByClassName("backlink");var ls=[];var l=elems.length;for(var idx=0;idx<l;idx++){var e=elems[idx];ls.push(e);}
 for(var elem in ls){inject_hover(prefix,ls[elem]);}}
-function init(prefix){inject_hover_for_element(document);var rpl=getReplyTo();rpl.setPrefix(prefix);var e=rpl.elem;e.setAttribute("draggable","true");var mouseDownX,mouseDownY;var originalX=10;var originalY=10;rpl.moveTo(originalX,originalY);e.addEventListener("dragstart",function(ev){mouseDownX=ev.clientX;mouseDownY=ev.clientY;},false);e.addEventListener("dragend",function(ev){var x=originalX+ev.clientX-mouseDownX;var y=originalY+ev.clientY-mouseDownY;x=window.screenX-x;rpl.moveTo(x,y);originalX=x;originalY=y;},false);}
+function init(prefix){inject_hover_for_element(document);var rpl=getReplyTo();rpl.setPrefix(prefix);var e=rpl.elem;e.setAttribute("draggable","true");var mouseDownX,mouseDownY;var originalX=10;var originalY=10;rpl.moveTo(originalX,originalY);e.addEventListener("dragstart",function(ev){mouseDownX=ev.clientX;mouseDownY=ev.clientY;},false);e.addEventListener("dragend",function(ev){var x=originalX+ev.clientX-mouseDownX;var y=originalY+ev.clientY-mouseDownY;x=window.screenLeft-x;rpl.moveTo(x,y);originalX=x;originalY=y;},false);}
 /* ./contrib/js/banner.js */
 var banner_count=3;function nntpchan_inject_banners(elem,prefix){var n=Math.floor(Math.random()*banner_count);var banner=prefix+"static/banner_"+n+".jpg";var e=document.createElement("img");e.src=banner;e.id="nntpchan_banner";elem.appendChild(e);}
 /* ./contrib/js/expand-image.js */