javascript加载xml文件

function loadXml(xmlPath)
{
var xmlDoc = null;
try
{
xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
}
catch(e)
{
try
{
xmlDoc = document.implementation.createDocument("","",null);
}
catch(e)
{
alert("xmlDoc创建失败：" + e.message);
}
}
try
{
xmlDoc.async = false;
xmlDoc.load(xmlPath);
}
catch(e)
{
alert("xml加载失败:" + e.message);
}
return xmlDoc;
}