Line 221, Column 10: ID "recent" already defined 
<div id="recent" class="widget">

An "id" is a unique identifier. Each time this attribute is used in a document it must have a different value. If you are using this attribute as a hook for style sheets it may be more appropriate to use classes (which group elements) than id (which are used to identify exactly one element). 


Line 137, Column 10: ID "recent" first defined here 
<div id="recent" class="widget">

2 tane id aynı olamaz diyo sanırım. birine recent yerine başka bişe yazıp dene.

Line 239, Column 336: document type does not allow element "form" here; missing one of "object", "applet", "map", "iframe", "ins", "del" start-tag 

…tResource', 'popupwindow', 'scrollbars=yes,width=550,height=520');return true">
 
The mentioned element is not allowed to appear in the context in which you've placed it; the other mentioned elements are the only ones that are both allowed there and can contain the element mentioned. This might mean that you need a containing element, or possibly that you've forgotten to close a previous element. 

One possible cause for this message is that you have attempted to put a block-level element (such as "<p>" or "<table>") inside an inline element (such as "<a>", "<span>", or "<font>").

bunda da satır yada tablo içinde oluşturulmadığını söylemiş. <p> <table> taglarını kullanırsan düzeleceği yazıyor.