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  1. #1
    New to the CF scene
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    Center a popup div

    Hello all,
    I am having trouble centering a div that goes from invisible to visible.

    here is my current messagebox petitioner :

    function positionMessageBox()
    {

    document.getElementById("message").style.top = "100px";

    document.getElementById("message").style.left = ((document.getElementById("message").offsetWidth/2))+"px";
    if(mouseY>height)
    document.getElementById("mask").style.height= (mouseY + 50)+"px";
    }


    Edit: it displays the popup at the left most section of the holder div, and is listing to the 'top' instructions, but not the 'left' instructions.





    Thanks a lot!
    Last edited by bombproof; 02-25-2013 at 12:49 AM. Reason: forgot an element

  • #2
    New Coder
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    Sunnyvale, CA
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    What do you get when you..

    alert( "offset = " + document.getElementById("message").offsetWidth/2 );

    ?

  • #3
    Senior Coder rnd me's Avatar
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    Jun 2007
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    Urbana
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    Code:
    .outer { text-align: center; }
    or
    Code:
    .inner { margin: 0 auto; }
    my site (updated 13/9/26)
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