javascript Ajax 类实现代码

                o=document.all(_obj);
            }catch(e){
                return null;
            }
        }catch(ee){
            try{
                o=document.getElementById(_obj);
            }catch(e){
                return null;
            }
        }
        return o;
    }
}

function funEscapeAll(str){
    var t = "&";
    var s = str.split(t);
    if(s.length<=0)    return str;
    for(var i=0; i<s.length; i++){
        s[i] = funEscapeOne(s[i]);
    }
    return s.join(t);
}

function funEscapeOne(str){
    var i = str.indexOf("=");
    if(i==-1) return str;
    var t = URLEncode(str.substr(i+1));
    return str.substring(0, i+1)+t;
}

function URLEncode(str){
    return encodeURIComponent(str);
/*    
    return escape(str).replace(/+/g, "%2B").
                replace(/"/g,"%22").
                 replace(/'/g, "%27").
                     replace(///g,"%2F");
*/
}

function funEscapeXML(content) {
if (content == undefined)
return "";
if (!content.length || !content.charAt)
content = new String(content);
var result = "";
var length = content.length;
for (var i = 0; i < length; i++) {
var ch = content.charAt(i);
switch (ch) {
case '&':
result += "&";
break;
case '<':
result += "<";
break;
case '>':
result += ">";
break;
case '"':
result += """;
break;
case ''':
result += "'";
break;
default:
result += ch;
}
}
return result;
}

function funShow(_obj){
    if(typeof(_obj)=="object")