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Tip of the Day
Language: ASP.NET
Expertise: Intermediate
May 18, 2004



Application Security Testing: An Integral Part of DevOps

Create Rollover Graphics in ASPX Pages

Although this tip creates onmouseover and onmouseout attributes in the IMG tag within the A tag when rendered to the browser, it could be used to set any attributes.

Create a Hyperlink control on the .aspx page (with an ID of 'lnkImage' in this example). In the codebehind, create a new image, set it's attributes and add it to the controls collection of the hyperlink (substitute you own images for icon.gif and icon_hot.gif):

Private Sub Page_Load ...
    Dim IMG as new WebControls.Image
    IMG.ImageUrl = "Images/icon.gif"
    IMG.Attributes.Add("onmouseover", "this.src='Images/image_hot.gif';")
    IMG.Attributes.Add("onmouseout", "this.src='Images/image.gif';")
End Sub
David Derf
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