ChangeSize();

function ChangeSize()
{
    selectedItems = selection;
    // check to make sure something is selected.
    if (selectedItems.length == 0)
    {
        alert("Nothing is selected");
        return;
    }

    endIndex = selectedItems.length;

    for (index = 0; index < endIndex; index++)
    {
        pageObject = selectedItems[index];
        pageItemType = pageObject.typename;

            if (pageItemType == "TextFrame")
            {
                // get the paragraphs from the selection.
                theTextRange = pageObject.textRange;
                paraTextRange = theTextRange.paragraphs;
                numParagraphs = paraTextRange.length;

                   for (i = 0 ; i < numParagraphs ; i++)
                   {
                         aParagraph = paraTextRange[i];

                         charTextRange = aParagraph.characters;
                         charCount = charTextRange.length;

                         if (charCount > 1)
                         {
 
                               beginFontSize = 50;
                               endFontSize = Math.round(beginFontSize*0.2);
                               fontChange = Math.round((beginFontSize - endFontSize)/(charCount-2));
                               for (j = 0 ; j < charCount; j++)
                               {
                                      theChar = charTextRange[j];
                                      theChar.size = currentFontSize;*** 
                                      currentFontSize = currentFontSize - fontChange;
                               }
                         }
                   }
             }
      }
}