为什么我无法在jQuery中加载特定的文本文件?

function go(){  
        //var myFile = "c:/BMCclient.log";  
        var myFile = "abc.html";
        $.get( myFile, function(data) {
        alert ( data );
            $('#_content').html(data);
            alert('Load was performed.');
            });

    }   

什么时候? myFile = "abc.html"; myFile = "c:/BMCclient.log"; 然后抛出一个异常:

uncaught exception: [Exception... "Component returned failure code: 0x805e000a [nsIXMLHttpRequest.open]" nsresult: "0x805e000a (<unknown>)" location: "JS frame :: file:///C:/PIC/batch/personal/web/js/jquery/jquery-1.4.2.js :: anonymous :: line 5113" data: no]