//定义广告前缀
var __AD_PREFIX = /__PCHOME_AD_SYS_/ig;
var __AD_FLASH_PREFIX = /^<object/ig;
//innerHTML 定义
var global_html_pool = [];
var global_script_pool = [];
var global_script_src_pool = [];
var global_lock_pool = [];
var innerhtml_lock = null;
var document_buffer = "";
//edit by edwardpro 20071207
function get_script_id(obj_id) {
	return "script_" +obj_id+"_" + Math.floor(Math.random() * 100000000).toString(36);
}
/**
 * innerHTML 执行JS脚本
 * 
 * @param obj_id
 * @param html
 * @param time
 */
function setInnerHTML(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("setInnerHTML('" + obj_id + "', global_lock_pool['" + obj_id + "_html']);", 1);
        return;
    } else if (innerhtml_lock != obj_id) {
        global_lock_pool[obj_id + "_html"] = html;
        window.setTimeout("setInnerHTML('" + obj_id + "', global_lock_pool['" + obj_id + "_html'], " + time + ");", 1);
        return;
    }
    
    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 += 1000;
            }
            else {
                s += 30;
            }
        }
        else {
            script.text = scripts[i].text;
            s += 30;
        }
        script.defer = true;
        script.type =  "text/javascript";
        script.id = get_script_id(obj_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 += "setInnerHTML('" + 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);
}


/**
 * 检查是不是PChome广告TAG
 * 
 * @param   tagName   string
 * @return  boolean
 */
function isPchomeAdTag( tagName ) {

    if(tagName.match(__AD_PREFIX)) {

        return true;
    } else {

        return false;
    }
}

/**
 * 获取所有广告TAG列表
 *
 * @param   void
 * @return  array
 */
function getADList(){

    var adElements  = new Array();
    var tagElements = document.getElementsByTagName('div');
	var oneTag;

    for( var i=0; i < tagElements.length; i++) {

		oneTag = tagElements[i].id;
		
        if( isPchomeAdTag(oneTag) ) {

            adElements.push(oneTag.replace(__AD_PREFIX, ''));
			
        }
		
    }

    return adElements;
}

/**
 * 得取获取AD内容的参数
 * 
 * @param   adList  array
 * @return  string
 */
function getADParams(adList) {

    var adString    = '';

    for( var i=0; i< adList.length; i++) {

        adString = adString + ';' + adList[i];
    }

    adString = adString.substr(1,adString.length - 1);

    return adString;
}


/**
 * 取得AD内容
 * 
 * @param   adList  arrau
 * @return  array
 */
function getADContent(adList) {
    //如果没有定义广告系统标志，返回空
    if (typeof(btmSystem) == 'undefined') {
        return false;
　  }
    //如果没有定义广告系统标志参数，返回空
    if (typeof(btmFlag) == 'undefined') {
        return false;
　  }
    var params = getADParams(adList);
    //如果参数为空，返回空
    if( params=='' ) {
        return false;
    }
    //组合URL
    var qStr = 'btmList=' + params + '&btmSystem=' + btmSystem + '&btmFlag=' + btmFlag;
    if(typeof(btmExtFlag) != 'undefined') {
        qStr = qStr + '&btmExtFlag=' + btmExtFlag;
    }
	var url = 'http://btm.pchome.net/index.php?' + qStr;
	//document.write(url);
	document.write('<script language="JavaScript" src="' + url + '"></script>');
}

/**2007-3-26
 * 显示PChomeAD
 * 
 * @param   void
 * @return  void
 */
function showPchomeBtm() {
    var adList      = getADList();
    var adContent   = getADContent(adList);
}

//得到flash广告
function getFlashAdList(){
	var adList = document.getElementsByTagName('div');
	alert(adList);
	for(var i=0; i< adList.length; i++){
		alert(adList[i].id);
		if(adList[i].id.match(__AD_FLASH_PREFIX) && isPchomeAdTag(adList[i].id)){
			//alert(adList[i]);
		}
	}
}