検索条件に日付の絞り込みが指定されている場合、開始日（from）が指定されている場合にタグの内容を処理します。
使い方
<MTIfAltSearchFrom> <!-- do something --> </MTIfAltSearchFrom>
MTIfAltSearchFrom と関連のあるテンプレートタグ (55)
- MTAltSearchMetadata
- MTYear
- MTAltSearchLast
- MTAltSearchResultNumber
- MTAltSearchQuery
- MTAltSearchParam
- MTAltSearchResultOffset
- MTAltSearchCategoryLabel
- MTAltSearchCategoryID
- MTAltSearchBlogID
- MTAltSearchSort_by
- MTAltSearchSort_order
- MTAltSearchPath
- MTAltSearchAnd_or
- MTAltSearchCategoryIDs
- MTAltSearchCategories_and_or
- MTAltSearchFeedPath
- MTAltSearchLimit
- MTAltSearchOffset
- MTAltSearchDate
- MTAltSearchFrom
- MTAltSearchTo
- MTAltSearchResultPermalink
- MTIfAltSearchModeIsTag
- MTIfAltSearchDate
- MTIfAltSearchSort_by
- MTIfAltSearchSort_order
- MTIfAltSearchMatchQuery
- MTIfAltSearchCurrentCategory
- MTIfAltSearchNoneMatch
- MTIfAltSearchParam
- MTIfAltSearchDate
- MTIfAltSearchFrom
- MTIfAltSearchTo
- MTIfAltSearchAnd_or
- MTIfAltSearchModeIsCategories
- MTIfAltSearchCurrentCategories
- MTIfAltSearchCategories_and_or
- MTAltSearchCurrent
- MTAltSearchMatch
- MTAltSearchPrev
- MTAltSearchNext
- MTAltSearchPages
- MTIfAltSearchResultPrev
- MTIfAltSearchResultNext
- MTIfAltSearchQuery
- MTIfAltSearchModeIsCategory
- MTAltSearchPageCounter
- MTIfAltSearchResultCurrent
- MTIfAltSearchMetaDatasFooter
- MTIfAltSearchMetaDatasHeader
- MTAltSearchMetadatas
- MTIfCurrentYear
- MTYears
- MTAltSearchResults
