ajax 异步获取数据实现代码 （js创建ajax对象）

代码如下:[removed]<!– var request = false; try { request = new XMLHttpRequest(); } catch (trymicrosoft) { try { request = new ActiveXObject(“Msxml2.XMLHTTP”); } catch (othermicrosoft) { try { request = new ActiveXObject(“Microsoft.XMLHTTP”); } catch (failed) { request = false; } }