// JScript 文件

/* innerhtml.js   
 * Copyright Ma Bingyao <andot@ujn.edu.cn>   
 * Version: 1.9   
 * LastModified: 2006-06-04   
 * This library is free.  You can redistribute it and/or modify it.   
 * http://www.coolcode.cn/?p=117   
 */   
   
var global_html_pool = [];    
var global_script_pool = [];    
var global_script_src_pool = [];    
var global_lock_pool = [];    
var innerhtml_lock = null;    
var document_buffer = "";    
   
function set_innerHTML(obj_id, html, time) {    
    if (innerhtml_lock == null) {    
        innerhtml_lock = obj_id;    
    }    
    else if (typeof(time) == "undefined") {    
        global_lock_pool[obj_id + "_html"] = html;    
        window.setTimeout("set_innerHTML('" + obj_id + "', global_lock_pool['" + obj_id + "_html']);", 10);    
        return;    
    }    
    else if (innerhtml_lock != obj_id) {    
        global_lock_pool[obj_id + "_html"] = html;    
        window.setTimeout("set_innerHTML('" + obj_id + "', global_lock_pool['" + obj_id + "_html'], " + time + ");", 10);    
        return;    
    }    
   
    function get_script_id() {    
        return "script_" + (new Date()).getTime().toString(36)    
          + Math.floor(Math.random() * 100000000).toString(36);    
    }    
   
    document_buffer = "";    
   
    document.write = function (str) {    
        document_buffer += str;    
    }    
    document.writeln = function (str) {    
        document_buffer += str + "\n";    
    }    
   
    global_html_pool = [];    
   
    var scripts = [];    
    html = html.split(/<\/script>/i);    
    for (var i = 0; i < html.length; i++) {    
        global_html_pool[i] = html[i].replace(/<script[\s\S]*$/ig, "");    
        scripts[i] = {text: '', src: '' };    
        scripts[i].text = html[i].substr(global_html_pool[i].length);    
        scripts[i].src = scripts[i].text.substr(0, scripts[i].text.indexOf('>') + 1);    
        scripts[i].src = scripts[i].src.match(/src\s*=\s*(\"([^\"]*)\"|\'([^\']*)\'|([^\s]*)[\s>])/i);    
        if (scripts[i].src) {    
            if (scripts[i].src[2]) {    
                scripts[i].src = scripts[i].src[2];    
            }    
            else if (scripts[i].src[3]) {    
                scripts[i].src = scripts[i].src[3];    
            }    
            else if (scripts[i].src[4]) {    
                scripts[i].src = scripts[i].src[4];    
            }    
            else {    
                scripts[i].src = "";    
            }    
            scripts[i].text = "";    
        }    
        else {    
            scripts[i].src = "";    
            scripts[i].text = scripts[i].text.substr(scripts[i].text.indexOf('>') + 1);    
            scripts[i].text = scripts[i].text.replace(/^\s*<\!--\s*/g, "");    
        }    
    }    
   
    var s;    
    if (typeof(time) == "undefined") {    
        s = 0;    
    }    
    else {    
        s = time;    
    }    
   
    var script, add_script, remove_script;    
   
    for (var i = 0; i < scripts.length; i++) {    
        var add_html = "document_buffer += global_html_pool[" + i + "];\n";    
        add_html += "document.getElementById('" + obj_id + "').innerHTML = document_buffer;\n";    
        script = document.createElement("script");    
        if (scripts[i].src) {    
            script.src = scripts[i].src;    
            if (typeof(global_script_src_pool[script.src]) == "undefined") {    
                global_script_src_pool[script.src] = true;    
                s += 2000;    
            }    
            else {    
                s += 10;    
            }    
        }    
        else {    
            script.text = scripts[i].text;    
            s += 10;    
        }    
        script.defer = true;    
        script.type =  "text/javascript";    
        script.id = get_script_id();    
        global_script_pool[script.id] = script;    
        add_script = add_html;    
        add_script += "document.getElementsByTagName('head').item(0)";    
        add_script += ".appendChild(global_script_pool['" + script.id + "']);\n";    
        window.setTimeout(add_script, s);    
        remove_script = "document.getElementsByTagName('head').item(0)";    
        remove_script += ".removeChild(document.getElementById('" + script.id + "'));\n";    
        remove_script += "delete global_script_pool['" + script.id + "'];\n";    
        window.setTimeout(remove_script, s + 10000);    
    }    
   
    var end_script = "if (document_buffer.match(/<\\/script>/i)) {\n";    
    end_script += "set_innerHTML('" + obj_id + "', document_buffer, " + s + ");\n";    
    end_script += "}\n";    
    end_script += "else {\n";    
    end_script += "document.getElementById('" + obj_id + "').innerHTML = document_buffer;\n";    
    end_script += "innerhtml_lock = null;\n";    
    end_script += "}";    
    window.setTimeout(end_script, s);    
}