diff --git a/_includes/datatable.html b/_includes/datatable.html
index 271e7a3..2e48277 100644
--- a/_includes/datatable.html
+++ b/_includes/datatable.html
@@ -36,16 +36,28 @@ function sortTable(n) {
       one from current row and one from the next: */
       x = rows[i].getElementsByTagName("TD")[n];
       y = rows[i + 1].getElementsByTagName("TD")[n];
+      xval = x.innerHTML;
+      yval = y.innerHTML;
+      if (!isNaN(parseInt(xval))) {
+        xval = parseInt(xval);
+      } else {
+        xval = xval.toLowerCase();
+      }
+      if (!isNaN(parseInt(yval))) {
+        yval = parseInt(yval);
+      } else {
+        yval = yval.toLowerCase();
+      }
       /* Check if the two rows should switch place,
       based on the direction, asc or desc: */
       if (dir == "asc") {
-        if (x.innerHTML.toLowerCase() > y.innerHTML.toLowerCase()) {
+        if (xval > yval) {
           // If so, mark as a switch and break the loop:
           shouldSwitch = true;
           break;
         }
       } else if (dir == "desc") {
-        if (x.innerHTML.toLowerCase() < y.innerHTML.toLowerCase()) {
+        if (xval < yval) {
           // If so, mark as a switch and break the loop:
           shouldSwitch = true;
           break;