拼接字符串：

var xmlDoc; if (browserType == BROWSER_IE) { xmlDoc = new ActiveXObject("Msxml.DOMDocument"); } else { xmlDoc = document.createElement("DOM"); } var root = xmlDoc.createElement("root"); for (var i = 0; i < 50000; i++) { var node = xmlDoc.createElement("data"); if (browserType == BROWSER_IE) { node.text = "xxxxxx"; } else { node.innerText = "xxxxxx"; } root.appendChild(node); } xmlDoc.appendChild(root); var str; if (browserType == BROWSER_IE) { str = xmlDoc.xml; } else { str = xmlDoc.innerHTML; }