$(function() {
    var textareaHeight  = $("#textarea").height();
    var contentHeight   = $("#content").height();
    var greyfontHeight  = $("#grey-font").height();
    
    if ( (textareaHeight+15) >=  contentHeight )
    {
        contentHeight = textareaHeight + 30;
        $("#content").css({height: contentHeight});
        $("#grey-font").css({height: (contentHeight+231)})
    }
});