common.js

ajax patterns 这是关于ajax设计模式方面的原代码

/*
    Copyright 2006 Christian Gross http://www.devspace.com
    From the book Ajax Patterns and Best Practices

   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.
*/
function getSelectedValue( element) {
    var select = el( "age");
    //obj.age = select.options[ select.selectedIndex].value;
}

function setSelectedValue( element, value) {
    for( var c1 = 0; c1 < element.options.length; c1 ++) {
        if( element.options[ c1].value == value) {
            element.selectedIndex = c1;
            return;
        }
    }
}

function  convertToSource(obj) {

    if ( navigator.appName == 'Netscape' ) {
        return( obj.toSource() );
    }

    // ECMAScript and IE 5.00 do not support "toSource()", so lets try
    // implementing its functionality here

    var sourceString = "";

    if (typeof(obj) == "undefined")
    {
        sourceString = "undefined";
    }

    else if (obj == null)
    {
        sourceString = "null";
    }
    else if (typeof(obj) == "boolean" || typeof(obj) == "number" || typeof(obj) == "function")
    {
        sourceString = obj;
    }

    else if (typeof(obj) == "string")
    {
        sourceString = "'" + obj.replace(/([\\'"])/g, "\\$1") + "'";
    }

    else if (typeof(obj) == "object")
    {
        if (obj.constructor == Boolean)
        {
            sourceString = "new Boolean(" + obj.valueOf() + ")";
        }

        else if (obj.constructor == Number)
        {
            sourceString = "new Number(" + obj.valueOf() + ")";
        }

        else if (obj.constructor == String)
        {
            sourceString = "new String(" + convertToSource(obj.toString()) + ")";
        }

        else if (obj.constructor == Date)
        {
            sourceString = "new Date(" + obj.valueOf() + ")";
        }

        else if (obj.constructor == Array)
        {
            sourceString = "[";
            for (var i=0; i<obj.length; i++)
                sourceString += convertToSource(obj[i]) + ",";
            if (i>0)
                sourceString = sourceString.substring(0, sourceString.length-1);
            sourceString += "]";
        }

        else if (obj.constructor == RegExp)
        {
            sourceString = obj.toString().replace(/\\/g, "\\\\");
        }

        else if (obj.constructor == Object)
        {
            var sourceString = "{"
            for (var key in obj)
                sourceString = sourceString + "" + key + ":" + convertToSource(obj[key]) + ","
            if (sourceString.length > 1)
                sourceString = sourceString.substring(0, sourceString.length-1);
            sourceString += "}";
        }
    }

    else
    {
        sourceString = "convertToSource encountered unexpected object type: " + typeof(obj);
    }

    return sourceString;

} 


// http://www.dustindiaz.com/top-ten-javascript/
// 
// http://dean.edwards.name/my/cssQuery/
// 
function el( id) {
    return document.getElementById( id);
}

function elParseElement( element, findid) {
    if( element.nodeType == 1) {
        if( element.id == findid) {
            return element;
        }
        for( var i = 0; i < element.childNodes.length; i ++) {
            var retval = elParseElement( element.childNodes[ i], findid);
            if( retval) {
                return retval;
            }
        }
    }
    return null;
}

function localel( parent, findid) {
    return elParseElement( document.getElementById( parent), findid);
}

function addEvent(elm, evType, fn, useCapture) {
    if (elm.addEventListener) {
        elm.addEventListener(evType, fn, useCapture);
        return true;
    }
    else if (elm.attachEvent) {
        var r = elm.attachEvent('on' + evType, fn);
        return r;
    }
    else {
        elm['on' + evType] = fn;
    }
}

function addLoadEvent(func) {
    var oldonload = window.onload;
    if (typeof window.onload != 'function') {
        window.onload = func;
    }
    else {
        window.onload = function() {
            oldonload();
            func();
        }
    }
}

//addEvent(window,'load',func1,false);
//addEvent(window,'load',func2,false);
//addEvent(window,'load',func3,false);
// 

function getElementsByClass(searchClass,node,tag) {
    var classElements = new Array();
    if ( node == null )
        node = document;
    if ( tag == null )
        tag = '*';
    var els = node.getElementsByTagName(tag);
    var elsLen = els.length;
    var pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");
    for (i = 0, j = 0; i < elsLen; i++) {
        if ( pattern.test(els[i].className) ) {
            classElements[j] = els[i];
            j++;
        }
    }
    return classElements;
}

function switchMenu(obj) {
    var el = document.getElementById(obj);
    if ( el.style.display != 'none' ) {
        el.style.display = 'none';
    }
    else {
        el.style.display = '';
    }
    
}

function insertAfter(parent, node, referenceNode) {
    parent.insertBefore(node, referenceNode.nextSibling);
}

Array.prototype.inArray = function (value) {
    var i;
    for (i=0; i < this.length; i++) {
        if (this[i] === value) {
            return true;
        }
    }
    return false;
}

function getCookie( name ) {
    var start = document.cookie.indexOf( name + "=" );
    var len = start + name.length + 1;
    if ( ( !start ) && ( name != document.cookie.substring( 0, name.length ) ) ) {
        return null;
    }
    if ( start == -1 ) return null;
    var end = document.cookie.indexOf( ";", len );
    if ( end == -1 ) end = document.cookie.length;
    return unescape( document.cookie.substring( len, end ) );
}
    
function setCookie( name, value, expires, path, domain, secure ) {
    var today = new Date();
    today.setTime( today.getTime() );
    if ( expires ) {
        expires = expires * 1000 * 60 * 60 * 24;
    }
    var expires_date = new Date( today.getTime() + (expires) );
    document.cookie = name+"="+escape( value ) +
        ( ( expires ) ? ";expires="+expires_date.toGMTString() : "" ) + //expires.toGMTString()
        ( ( path ) ? ";path=" + path : "" ) +
        ( ( domain ) ? ";domain=" + domain : "" ) +
        ( ( secure ) ? ";secure" : "" );
}
    
function deleteCookie( name, path, domain ) {
    if ( getCookie( name ) ) document.cookie = name + "=" +
            ( ( path ) ? ";path=" + path : "") +
            ( ( domain ) ? ";domain=\"" + domain : "" ) +
            ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
}

function $() {
    var elements = new Array();
    for (var i = 0; i < arguments.length; i++) {
        var element = arguments[i];
        if (typeof element == 'string')
            element = document.getElementById(element);
        if (arguments.length == 1)
            return element;
        elements.push(element);
    }
    return elements;
}
    
// Sample Usage:
/*var obj1 = document.getElementById('element1');
var obj2 = document.getElementById('element2');
function alertElements() {
  var i;
  var elements = $('a','b','c',obj1,obj2,'d','e');
  for ( i=0;i<elements.length;i++ ) {
    alert(elements[i].id);
  }
}*/