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Asked: 2026-06-18T05:24:14+00:00

we have the following situation: in default.aspx we have a link: <a href=javascript:doPost()>test</a>. and

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we have the following situation:

in default.aspx we have a link:

<a href="javascript:doPost()">test</a>.

and the JS code:

function doPost() {
    $.post('AnHttpHandlerPage.aspx',"{some_data:...}", function(data) {
        if(data.indexOf("http://")==0)
            window.open(data);
        else{
            var win=window.open();
            with(win.document) {
                open();
                write(data); //-> how to execute this HTML code? The code also includes references to other js files.
                close();
            }  
        }
    }).error(function(msg){document.write(msg.responseText);});
}

The callback can first be an url address or 2nd html code that must be executed.
Option 1 fits, but in option 2, a new window will be opened where the code has been written but not executed.

It’s clear, since it happens in the stream, it can’t be executed. So the question, how can you fix it? Maybe a refresh(), or similar?

Because of the requirement of the customer, the workflow can not be changed, so it must be solved within doPost().

EDIT

The response in case 2 is HTML like this. This part should be executed:

<HTML><HEAD>
<SCRIPT type=text/javascript src="http://code.jquery.com/jquery-latest.js">
</SCRIPT>
<SCRIPT type=text/javascript>                      
$(document).ready(function() {
do_something... 
});                          
</SCRIPT>
</HEAD>
<BODY>
<FORM>...</FORM>
</BODY>
</HTML>

Please help. Thanks.

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1 Answer

  1. Editorial Team

    In your JS code it should be something like this:

    function doPost() {
    $.post('AnHttpHandlerPage.aspx',"{some_data:...}", function(data) {
        //if(data.indexOf("http://")==0)
              if (data.type!="url")   //i will add a data type to my returned json so i can differentiate if its url or html to show on page.
            window.open(); // I dont know why this is there. You should
        else{
            var win=window.open(data.url); //This data.url should spit out the whole page you want in new window. If its external it would be fine. if its internal maybe you can have an Action on one of your controllers that spit it with head body js css etc.
        /*  with(win.document) {
                open();
                write(data); //-> how to execute this HTML code? The code also includes references to other js files.
                close(); */ // No need to write data to new window when its all html to be rendered by browser. Why is this a requirement.
            }  
        }
    }).error(function(msg){document.write(msg.responseText);});
}

    The overall logic is this

    1. You do your ajax call on doPost
    2. Find out if data returned is of type url or anything that need to open in new window
    3. If it is url type it would have a url (check if this is not null or empty or even a valid url) then open a new window with that url. Have a read of W3C window.open for parameters
    4. If you want to open and close it for some reason just do that by keeping the window handle but you can do this on dom ready event of that new window otherwise you might end up closing it before its dom is completely loaded. (someone else might have better way)
    5. If its not url type then you do your usual stuff on this page.

    If this does not make sense lets discuss.

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