jquery and .attri doesn't work?

Here is my code:

function init(){
    $.get(URL, function(data) {
     DATA = data;
     var srcWithHead = URL + "/" + $(DATA).find("img").attr("src");
     $(DATA).find("img").attr("src", srcWithHead);
     console.log("src = " + $(DATA).find("img").attr("src"));
    });
}

And I would like to have a picture showing. But the 开发者_JS百科URL image src is a relative path. So, I need to have a header of each image. But it seems that $(DATA).find("img").attr("src", srcWithHead); doesn't work.

What can I do? and any other method? Thanks

You probably have multiple IMG tags. Use each() to access each one.

function init(){
    $.get(URL, function(data) {
    DATA = data;
    $(DATA).find("img").each(function() {
        var srcWithHead = URL + "/" + $(this).attr("src");
        $(DATA).find("img").attr("src", srcWithHead);
    });
}

Could it be that you're not finding any elements?

Try

alert($(DATA));
alert($(DATA).length);
alert($(DATA).find('img').length);

try to eval your data, i'm not sure here since I don't know what would be the data be, but give this a try.

function init(){
    $.get(URL, function(data) {
       DATA = eval("("+data+")"); // treat the data as json object
       var srcWithHead = URL + "/" + $(DATA).find("img").attr("src");
       $(DATA).find("img").attr("src", srcWithHead);
       console.log("src = " + $(DATA).find("img").attr("src"));
    });
}

I was working with attr today and the following works for me.

 $('#ctl00_Content_imgbtnDiscardQuote')
    .attr('src','').attr('value','Cancel').attr('type','submit');

Try running $(DATA); in firebug or chrome console, it may not be returning what you think.

Edit try .each()

$(DATA).find('img').each(function(index){ 
    $(this).attr('src','/myimg.jpg'); 
});

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