Implement transparent png images and png backgrounds (supports multiple browsers)

Although javascript programs that allow IE6 to support PNG transparent backgrounds are not convenient, CSS is better. The AlphaImageLoader filter of IE5.5 + is used.
1.png transparent background
Solution:
Copy codeThe Code is as follows:
# Div1 {
Height: 600px;
Width: 260px;
Padding: 20px;
Background-repeat: repeat;
}
Html> body # div1 {
Background-repeat: repeat; background-image: url(bj1.png );
}
* # Div1 {filter: progid: DXImageTransform. Microsoft. AlphaImageLoader (enabled = true, sizingMethod = scale, src = "bj1.png ")
}

Additional: IE only recognizes wildcards (*) to define filters in IE browsers.
Firefox, Opera, and other browsers that fully support PNG transparent images also support sub-selectors (>)
Syntax:
Filter: progid: DXImageTransform. Microsoft. AlphaImageLoader (enabled = bEnabled, sizingMethod = sSize, src = sURL)
Attribute:
Enabled: Optional. Boolean ). Set or retrieve whether the filter is activated. True | false
True: default value. Filter activation.
False: the filter is disabled.
SizingMethod: Optional. String ). Sets or retrieves the display mode of the image of the object to which the filter applies within the boundary of the object container. Crop: Cut the image to fit the object size.
Image: default value. Increase or decrease the size boundary of an object to fit the image size.
Scale: scale the image to adapt to the size boundary of the object.
Src: required. String ). Specify the background image using an absolute or relative url. If this parameter is ignored, the filter will not work.
2.png image transparency
If you want to directly insert a png image into a webpage to make it transparent, you only need to add the following js Code. All directly inserted png images on the page can be transparent:
Copy codeThe Code is as follows:
<Script language = "JavaScript">
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.css Text
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 );
</Script>