相信很多Ajax初学者都会遇到:用innerhtml插入的JS脚本无法执行,用Google搜了很久,找了两个不错的解决方案...
方案1:来自济南大学马秉尧老师的innerhtml.js
JavaScript代码
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- var global_html_pool = [];
- var global_script_pool = [];
- var global_script_src_pool = [];
- var global_lock_pool = [];
- var innerhtml_lock = null;
- var document_buffer = "";
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- 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;
- }
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- function get_script_id() {
- return "script_" + (new Date()).getTime().toString(36)
- + Math.floor(Math.random() * 100000000).toString(36);
- }
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- document_buffer = "";
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- document.write = function (str) {
- document_buffer += str;
- }
- document.writeln = function (str) {
- document_buffer += str + "\n";
- }
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- global_html_pool = [];
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- 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, "");
- }
- }
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- var s;
- if (typeof(time) == "undefined") {
- s = 0;
- }
- else {
- s = time;
- }
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- var script, add_script, remove_script;
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- 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);
- }
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- 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);
- }
在线DEMO:http://test.coolcode.cn/innerhtml/
JS调用方法:
JavaScript代码
- set_innerHTML('要插入innerhtml的ID名称', '要插入的代码');
方案2:来自www.ajaxwing.com的
调用方法:
JavaScript代码
- setInnerHTML('DOM 树中的节点', '要插入的代码');
简单版充分利用了浏览器自身的特性,执行效率高,兼容性好。唯一的缺点就是脚本中不能包含 document.write。