Ilyan, чему равна переменная checked?
	
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			 Цитата: 
		
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		Syntax 
 
HTML <ELEMENT CHECKED = bChecked ... >   
Scripting object.checked [ = bChecked ]  
 
Possible Values 
 
bChecked Boolean that specifies or receives one of the following values: 
false Default. Control is not selected.  
true Control is selected. 
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Свой тестовый пример покажи...