用ASP+CSS實現(xiàn)隨機背景的實例代碼分享
作者: 來源: 發(fā)布時間:2011-7-8 11:19:40 點擊:
這篇文章提供給大家分享學習的是關(guān)于用ASP+CSS實現(xiàn)隨機背景的實例代碼,希望能夠給大家?guī)韼椭騿l(fā)。
隨機背景--當你每次進入該頁面時,從已指定的圖片文件夾中,隨機選取一個圖片作為背景顯示。這里介紹的方法是用ASP+CSS來實現(xiàn)的。
ASP--來自ASP101
以下是引用片段:
Const IMGS_DIR = "/images"
'設定圖片文件夾的地址,隨機顯示該文件夾內(nèi)任一張圖片
Dim objFSO, objFolderObject, objFileCollection, objFile
Dim intFileNumberToUse, intFileLooper
Dim objImageFileToUse
Dim strImageSrcText
Set objFSO = Server.CreateObject("Scripting.FileSystemObject")
Set objFolderObject = objFSO.GetFolder(Server.MapPath(IMGS_DIR))
Set objFSO = Nothing
Set objFileCollection = objFolderObject.Files
Set objFolderObject = Nothing
Randomize()
intFileNumberToUse = Int(objFileCollection.Count * Rnd) + 1
intFileLooper = 1
For Each objFile in objFileCollection
If intFileLooper = intFileNumberToUse Then
Set objImageFileToUse = objFile
Exit For
End If
intFileLooper = intFileLooper + 1
Next
Set objFileCollection = Nothing
strImageSrcText = IMGS_DIR & objImageFileToUse.Name
Set objImageFileToUse = Nothing
Const IMGS_DIR = "/images"
'設定圖片文件夾的地址,隨機顯示該文件夾內(nèi)任一張圖片
Dim objFSO, objFolderObject, objFileCollection, objFile
Dim intFileNumberToUse, intFileLooper
Dim objImageFileToUse
Dim strImageSrcText
Set objFSO = Server.CreateObject("Scripting.FileSystemObject")
Set objFolderObject = objFSO.GetFolder(Server.MapPath(IMGS_DIR))
Set objFSO = Nothing
Set objFileCollection = objFolderObject.Files
Set objFolderObject = Nothing
Randomize()
intFileNumberToUse = Int(objFileCollection.Count * Rnd) + 1
intFileLooper = 1
For Each objFile in objFileCollection
If intFileLooper = intFileNumberToUse Then
Set objImageFileToUse = objFile
Exit For
End If
intFileLooper = intFileLooper + 1
Next
Set objFileCollection = Nothing
strImageSrcText = IMGS_DIR & objImageFileToUse.Name
Set objImageFileToUse = Nothing
CSS
以下是引用片段:
#pic{
width: 400px;
height: 300px;
background: url(<%= strImageSrcText %>) no-repeat;
margin: 2em auto;
}
#pic{
width: 400px;
height: 300px;
background: url(<%= strImageSrcText %>) no-repeat;
margin: 2em auto;
}
上面代碼要加在header區(qū),不能放在外部CSS文件里。
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