Change script function, can you?

Question

Hi everyone
I got this script,
function: change font size in selection
but I want to change the function to selection text frames
I mean: change the font size in all the selected text frames.
thanks
var the_document = app.documents.item(0);
var the_selection = app.selection[0];
var the_dialog = app.dialogs.add({name:"Resize selected text"});
with(the_dialog.dialogColumns.add()){
    with(dialogRows.add()){
        staticTexts.add({staticLabel:"Resize the selected text by"});
        var increase_by = measurementEditboxes.add({editUnits:MeasurementUnits.POINTS, editValue:0});
the_dialog.show();
counter = 0;
do {
    var current_character = the_selection.characters.item(counter);
    current_character.pointSize = current_character.pointSize + increase_by.editValue;
    counter++;
} while (counter < the_selection.characters.length);
alert("Done!");
VK

Answer 1

Try the following:
var sel = app.selection;
if (sel.length == 0 ) {
    alert ( "Nothing selected" ); exit();
var dlg = app.dialogs.add({ name: "Resize text in selected frames" });
dlg.dialogColumns.add().staticTexts.add({ staticLabel: "Resize the selected text by:" });
var increase_by = dlg.dialogColumns.add().measurementEditboxes.add({ editUnits:MeasurementUnits.POINTS, editValue: 0 });
if (dlg.show()) {
    var dlg_value = increase_by.editValue;
    dlg.destroy();
else {
    dlg.destroy(); exit();
for ( var i = 0; i < sel.length; i++ ) {
    var curSel = sel[i];
    if ( curSel.constructor.name == "TextFrame" ) {
        var tsr = curSel.parentStory.textStyleRanges;
        for ( var n = 0; n < tsr.length; n++ ) {
            var curTsr = tsr[n];
            curTsr.pointSize += dlg_value;
        } // for
    } // if
} // for
alert( "Done!" );
–Kai