validation.js

白广元写的java web整合开发完全自学手册的源代码

/*
 * $Id: Action.java 502296 2007-02-01 17:33:39Z niallp $
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

function clearErrorMessages(form) {

    // get field table
    var table;
    for (var i = 0; i < form.childNodes.length; i++) {
        if (form.childNodes[i].tagName != null && form.childNodes[i].tagName.toLowerCase() == 'table') {
            table = form.childNodes[i];
            break;
        }
    }

    if (table == null) {
        return;
    }
    
    // clear out any rows with an "errorFor" attribute
    var rows = table.rows;
    var rowsToDelete = new Array();
    if (rows == null){
        return;
    }

    for(var i = 0; i < rows.length; i++) {
        var r = rows[i];
        if (r.getAttribute("errorFor")) {
            rowsToDelete.push(r);
        }
    }

    // now delete the rows
    for (var i = 0; i < rowsToDelete.length; i++) {
        var r = rowsToDelete[i];
        table.deleteRow(r.rowIndex);
        //table.removeChild(rowsToDelete[i]); 
    }
}

function clearErrorLabels(form) {
    // set all labels back to the normal class
    var elements = form.elements;
    for (var i = 0; i < elements.length; i++) {
        var e = elements[i];
        var cells = e.parentNode.parentNode.cells;
        if (cells && cells.length >= 2) {
            var label = cells[0].getElementsByTagName("label")[0];
            if (label) {
                label.setAttribute("class", "label");
                label.setAttribute("className", "label"); //ie hack cause ie does not support setAttribute
            }
        }
    }

}

function addError(e, errorText) {
    try {
        // clear out any rows with an "errorFor" of e.id
        var row = e.parentNode.parentNode;
        var table = row.parentNode;
        var error = document.createTextNode(errorText);
        var tr = document.createElement("tr");
        var td = document.createElement("td");
        var span = document.createElement("span");
        td.align = "center";
        td.valign = "top";
        td.colSpan = 2;
        span.setAttribute("class", "errorMessage");
        span.setAttribute("className", "errorMessage"); //ie hack cause ie does not support setAttribute
        span.appendChild(error);
        td.appendChild(span);
        tr.appendChild(td);
        tr.setAttribute("errorFor", e.id);;
        table.insertBefore(tr, row);

        // updat the label too
        var label = row.cells[0].getElementsByTagName("label")[0];
        label.setAttribute("class", "errorLabel");
        label.setAttribute("className", "errorLabel"); //ie hack cause ie does not support setAttribute
    } catch (e) {
        alert(e);
    }
}