Resize fbml.dialog

var oldSize = FB.UIServer.Methods["fbml.dialog"].size;
FB.UIServer.Methods["fbml.dialog"].size = {width:300, height:150};

var dialog = {
    method: 'fbml.dialog',
    fbml: '<fb:header icon="false" decoration="add_border">Some Prompt</fb:header>' +
        '<div style="width:100%; height:100%;" align="center">' +
        '<div style="margin:15px;">Do you wish to continue?</div>' +
        '<label class="uiButton uiButtonLarge uiButtonConfirm"><input type="button" name="OK" value="OK"></label>' +
        '<label class="uiButton uiButtonLarge uiButtonConfirm"><input type="button" name="Cancel" value="Cancel"></label>' +
        '</div>',
    width:300,
    height:150
};

FB.ui(dialog, function(result) { console.log(result); } );
FB.UIServer.Methods["fbml.dialog"].size = oldSize;