png图片(有含有透明)在IE6中为什么不透明了

   
   

    
    function
     correctPNG() 
    //
     correctly handle PNG transparency in Win IE 5.5 & 6. 
    


            {


    var
     arVersion 
    =
     navigator.appVersion.split(
    "
    MSIE
    "
    )


    var
     version 
    =
     parseFloat(arVersion[
    1
    ])


    if
     ((version 
    >=
     
    5.5
    ) 
    &&
     (document.body.filters)) {


    for
     (
    var
     j 
    =
     
    0
    ; j 
    <
     document.images.length; j
    ++
    ) {


    var
     img 
    =
     document.images[j]


    var
     imgName 
    =
     img.src.toUpperCase()


    if
     (imgName.substring(imgName.length 
    -
     
    3
    , imgName.length) 
    ==
     
    "
    PNG
    "
    ) {


    var
     imgID 
    =
     (img.id) 
    ?
     
    "
    id='
    "
     
    +
     img.id 
    +
     
    "
    ' 
    "
     : 
    ""
    


    var
     imgClass 
    =
     (img.className) 
    ?
     
    "
    class='
    "
     
    +
     img.className 
    +
     
    "
    ' 
    "
     : 
    ""
    


    var
     imgTitle 
    =
     (img.title) 
    ?
     
    "
    title='
    "
     
    +
     img.title 
    +
     
    "
    ' 
    "
     : 
    "
    title='
    "
     
    +
     img.alt 
    +
     
    "
    ' 
    "
    


    var
     imgStyle 
    =
     
    "
    display:inline-block;
    "
     
    +
     img.style.cssText


    if
     (img.align 
    ==
     
    "
    left
    "
    ) imgStyle 
    =
     
    "
    float:left;
    "
     
    +
     imgStyle


    if
     (img.align 
    ==
     
    "
    right
    "
    ) imgStyle 
    =
     
    "
    float:right;
    "
     
    +
     imgStyle


    if
     (img.parentElement.href) imgStyle 
    =
     
    "
    cursor:hand;
    "
     
    +
     imgStyle


    var
     strNewHTML 
    =
     
    "
    <span 
    "
     
    +
     imgID 
    +
     imgClass 
    +
     imgTitle


    +
     
    "
     style=\
    ""
     + 
    "
    width:
    "
     + img.width + 
    "
    px; height:
    "
     + img.height + 
    "
    px;
    "
     + imgStyle + 
    "
    ;
    "
    

+ 
    "
    filter:progid:DXImageTransform.Microsoft.AlphaImageLoader
    "
    

+ 
    "
    (src
    =
    \
    '
    " + img.src + "\
    '
    , sizingMethod
    =
    '
    scale
    '
    );\
    "
    ></span>
    "
    

img.outerHTML 
    =
     strNewHTML

j 
    =
     j 
    -
     
    1
    

}

}

}

}

window.attachEvent(
    "
    onload
    "
    , correctPNG);