至于 IE6只能缩放文字,而IE7以上能支持整体缩放的原因:OLECMDID_ZOOM – This corresponds to the View menu's Text Size command. Only the text is scaled by using this command. Sites that have fixed text size are not changed in anyway. This command is used for primarily three purposes: querying the current zoom value, displaying the zoom dialog box, and setting a zoom value.OLECMDID_OPTICAL_ZOOM – Internet Explorer 7 and later. Sets the zoom factor of the browser. Takes a VT_I4 parameter in the range of 10 to 1000 (percent).
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