diff --git a/modules/analyze/html/custom.js b/modules/analyze/html/custom.js
index dd86734..550f989 100644
--- a/modules/analyze/html/custom.js
+++ b/modules/analyze/html/custom.js
@@ -154,6 +154,8 @@ function newwindow(id, title, content, height, width) {
                         // translate when resizing from top or left edges
                         x += event.deltaRect.left
                         y += event.deltaRect.top
+                        x = Math.max(0, x)
+                        y = Math.max(0, y)
 
                         target.style.transform = 'translate(' + x + 'px,' + y + 'px)'