function CheckBoxValues( oCheckBox , sField )
{
	oForm = oCheckBox.form;
	sName = oCheckBox.name;
	oHidden = oForm[sField];
	sValue = "";

	aInput = document.getElementsByTagName('input');                          
	for( i=0; i < aInput.length; i++ )
	{
		if ( aInput[i].name == sName || aInput[i].name == sName+"[]" )
		{
			if( aInput[i].checked )
				if( sValue != "" )
					sValue += "; " + aInput[i].value ;
				else
					sValue += aInput[i].value ;
		}
	}
	oHidden.value = sValue;
}