JavaScript-js解析xml

Question

function loadxml(tag,index){
        var str = "";
        var uRl = "MapInfo.xml"; 
        var xmlDoc; 
        if(window.ActiveXObject){ //IE浏览器
            xmlDoc=new ActiveXObject("Microsoft.XMLDOM"); 
            xmlDoc.async="false" 
            xmlDoc.load(uRl); 
            str = xmlDoc.getElementsByTagName(tag)[index].childNodes[0].nodeValue;
        } 
        else if(document.implementation && document.implementation.createDocument){ //FireFox浏览器
            xmlDoc=document.implementation.createDocument("", "root", null); 
            xmlDoc.load(uRl);
            xmlDoc.onload=function(){   
                str = xmlDoc.getElementsByTagName(tag)[index].childNodes[0].nodeValue; 
            };
        }else{
            alert("你的浏览器不支持javascript");
        }
        
        return str;
    }

Answer 1

function loadxml(tag,index){
var str = "";
var uRl = "MapInfo.xml";
var xmlDoc;
if(window.ActiveXObject){ //IE浏览器
xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
xmlDoc.async="false"
xmlDoc.load(uRl);
str = xmlDoc.getElementsByTagName(tag)[index].childNodes[0].nodeValue;
}
else if(document.implementation && document.implementation.createDocument){ //FireFox浏览器
xmlDoc=document.implementation.createDocument("", "root", null);
//同样需要取消异步请求
xmlDoc.async=false;
xmlDoc.load(uRl);
str = xmlDoc.getElementsByTagName(tag)[index].childNodes[0].nodeValue;
}else{
alert("你的浏览器不支持javascript");
}

return str;
}

好像是我复制出错了，现在呢？

Answer 2

这样试试：
把下面代码

else if(document.implementation && document.implementation.createDocument){ //FireFox浏览器
xmlDoc=document.implementation.createDocument("", "root", null);
xmlDoc.load(uRl);
xmlDoc.onload=function(){
str = xmlDoc.getElementsByTagName(tag)[index].childNodes[0].nodeValue;
}；
}

换成：

  else if(document.implementation && document.implementation.createDocument){ //FireFox浏览器
var parser = new DOMParser();
xmlDoc = parser.parseFromString("MapInfo.xml", "text/xml");
str = xmlDoc.getElementsByTagName(tag)[index].childNodes[0].nodeValue;
}