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-rw-r--r--js/util.js49
1 files changed, 49 insertions, 0 deletions
diff --git a/js/util.js b/js/util.js
index 6dcabbbc9..e0e87259f 100644
--- a/js/util.js
+++ b/js/util.js
@@ -202,6 +202,55 @@ function bz_populateSelectFromArray(aSelect, aArray) {
}
/**
+ * Returns all Option elements that are selected in a <select>,
+ * as an array. Returns an empty array if nothing is selected.
+ *
+ * @param aSelect The select you want the selected values of.
+ */
+function bz_selectedOptions(aSelect) {
+ // HTML 5
+ if (aSelect.selectedOptions) {
+ return aSelect.selectedOptions;
+ }
+
+ var start_at = aSelect.selectedIndex;
+ if (start_at == -1) return [];
+ var first_selected = aSelect.options[start_at];
+ if (!aSelect.multiple) return first_selected;
+ // selectedIndex is specified as being the "first selected item",
+ // so we can start from there.
+ var selected = [first_selected];
+ var options_length = aSelect.options.length;
+ // We start after first_selected
+ for (var i = start_at + 1; i < options_length; i++) {
+ var this_option = aSelect.options[i];
+ if (this_option.selected) selected.push(this_option);
+ }
+ return selected;
+}
+
+/**
+ * Returns all Option elements that have the "selected" attribute, as an array.
+ * Returns an empty array if nothing is selected.
+ *
+ * @param aSelect The select you want the pre-selected values of.
+ */
+function bz_preselectedOptions(aSelect) {
+ var options = aSelect.options;
+ var selected = new Array();
+ for (var i = 0, l = options.length; i < l; i++) {
+ var attributes = options[i].attributes;
+ for (var j = 0, m = attributes.length; j < m; j++) {
+ if (attributes[j].name == 'selected') {
+ if (!aSelect.multiple) return options[i];
+ selected.push(options[i]);
+ }
+ }
+ }
+ return selected;
+}
+
+/**
* Tells you whether or not a particular value is selected in a select,
* whether it's a multi-select or a single-select. The check is
* case-sensitive.