Jquery的跨域问题

I am trying to create a chrome extension which will look up the meaning of input vocabulary from this URL: http://hanviet.org/ajax.php?query=%E6%97%A5&methode=normal

I made an ajax call by using jquery but got an error because of the cross-domain issue: "No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access". Ok, I guest that instead of make a request directly to the URL, I need to call it through a proxy pages as below:

$.get("/myproxy.php?query=日&methode=normal", function( data ) {
    alert( "Load was performed." );
});

After doing a google search, there is another chrome extension named DHC to makes http request: https://www.sprintapi.com/dhcs.html. and It works perfectly!

I am wondering that does DHC tool also send a request through its proxy or there is another way to make a direct request that I dont know.

Thank you!

If you use the developers tools of chrome on that site, on Network tab you will see that after pressing the sendbutton it loads the content from https://www.sprintapi.com/api/proxy, so yes, it should be using a proxy.

Even more, as you say the Access-Control-Allow-Origin would'nt let they did it on another way I think.

    $.ajax({
        type: "GET",
        url: 'URL',
        jsonp: 'callback',
        dataType: 'jsonp',
        data: {},
        success: loginSuccess,
        crossDomain: true,
        error: ajaxFailed,
        contentType: 'application/json',
        async: false
    });

    function ajaxFailed(result) {
        alert("Failed: " + result.status + ' ' + result.statusText);
    }

    function loginSuccess(data) {
        alert('Result: ' + data.d);
    }