jQuery-Ajax错误

I have two input elements in my page.

<input type="button" id="
MyButton" onclick="SomeFunction()" value="click me" />
    <input type="text" id="text" />

I'm trying to get "Hello World" text from my a1.php using jQuery ajax, but I'm getting error, which says :

Network Error: Failed to execute 'send' on XMLHttpRequest: Failed to load 'file:///C:/a1.php'

Here's my javaScript function:

function SomeFunction()
    {
        //alert("AAAAAAAAAA");
        jQuery("#text").val("AAA"); 

        jQuery.ajax({
            type: "GET",
            url: "a1.php",
            success: function() {
                alert("OK");
            },
            error: function(jqXHR, textStatus, errorThrown) {
            alert(errorThrown);
            }
        });

}

Please help me to fix this little problem.

Your a1.php file must be directly inside your C: drive with this code. If it isn't you'll get this error.

Seems like you path location isn't right, you can do something like:

...
url: '/a1.php' OR url: 'http://localhost/myproject/a1.php'
...