Initial commit.

htdocs/htc/scripts/common.js

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+/* History: Theory and Culture
+ * common.js: The common JavaScript subroutines.
+ */
+
+/*  Copyright (c) 2000-2018 imacat.
+ * 
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+/* Author: imacat <imacat@mail.imacat.idv.tw>
+ * First written: 2000-07-25
+ */
+
+// _: Gettext
+function _(msg) {
+    var i;
+    for (i = 0; i < lc_messages.length; i++) {
+        if (lc_messages[i][0] == msg) {
+            return lc_messages[i][1];
+        }
+    }
+    return msg;
+}
+// The messages
+lc_messages = [];
+
+// isEmail: Check if an email address is legal
+function isEmail(a) {
+    var i, c, re;
+    if (typeof(RegExp) == "undefined") return true;
+    re = new RegExp("^[\\w\\-]+(\\.[\\w\\-]+)*\\@([\\w\\-]+\\.)+[\\w\\-]+$");
+    if (typeof(a) != "string") return false;
+    a = a.toLowerCase();
+    if (re.exec(a) == null) return false;
+    return true;
+}
+
+// trim: Trim the leading and tailing spaces
+function trim(a) {
+    var pos, start, len, spaces;
+    start = 0;
+    len = a.length;
+    spaces = " \t\f\n\r";
+    for (start = 0; start < a.length && spaces.indexOf(a.charAt(start)) >= 0; start++, len--);
+    for (pos = a.length - 1; pos >= 0 && spaces.indexOf(a.charAt(pos)) >= 0; pos--, len--);
+    return a.substr(start, len);
+}
+function trimText(a) {
+    var pos, start, len, spaces, newlines;
+    start = 0;
+    len = a.length;
+    spaces = " \t\f\n\r";
+    newlines = "\n\r";
+    for (start = 0; start < a.length && spaces.indexOf(a.charAt(start)) >= 0; start++, len--);
+    for ( ; start-1 >= 0 && newlines.indexOf(a.charAt(start-1)) < 0; start--, len++);
+    for (pos = a.length - 1; pos >= 0 && spaces.indexOf(a.charAt(pos)) >= 0; pos--, len--);
+    return a.substr(start, len);
+}
+
+// replace: Replace one phace with another in a string
+function replace(source, oldStr, newStr) {
+    var pos;
+    pos = 0;
+    while (true) {
+        pos = source.indexOf(oldStr, pos);
+        if (pos == -1) break;
+        source = source.substr(0, pos) + newStr + source.substr(pos + oldStr.length)
+        pos += newStr.length;
+    }
+    return source;
+}
+
+// clearDefault: Clear the default value of a column
+function clearDefault(col, deftext) {
+    if (col.value == deftext) {
+        col.value = "";
+    }
+}