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I want to replace some text in the following code that users can insert in a CMS system: 
 
&lt;object width=&quot;480&quot; height=&quot;385&quot;&gt;&lt;param name=&quot;movie&quot; value=&quot;<a href="http://www.youtube.com/v/W8_Kfjo3VjU&hl=nl_NL&fs=1&" rel="ugc">http://www.youtube.com/v/W8_Kfjo3VjU&hl=nl_NL&fs=1&</a>&quot;&gt;&lt;/param&gt;&lt;param name=&quot;allowFullScreen&quot; value=&quot;true&quot;&gt;&lt;/param&gt;&lt;param name=&quot;allowscriptaccess&quot; value=&quot;always&quot;&gt;&lt;/param&gt;&lt;embed src=&quot;<a href="http://www.youtube.com/v/W8_Kfjo3VjU&hl=nl_NL&fs=1&" rel="ugc">http://www.youtube.com/v/W8_Kfjo3VjU&hl=nl_NL&fs=1&</a>&quot; type=&quot;application/x-shockwave-flash&quot; allowscriptaccess=&quot;always&quot; allowfullscreen=&quot;true&quot; width=&quot;480&quot; height=&quot;385&quot;&gt;&lt;/embed&gt;&lt;/object&gt; 
 
As you can see this is from Youtube to embed a video. 
 
I want to replace these strings in the code: 
 
width=&quot;480&quot; 
height=&quot;385&quot; 
 
These strings can be variable. For instance someone can just insert: width=&quot;2480&quot; 
 
I want to avoid people from doing that. 
 
Those 2 stings need to be replaced by: 
 
width=&quot;320&quot; 
height=&quot;200&quot; 
 
Can anyone give some code to do that ? 
 
Also any idea's how to do a basic validation that the code people insert is indeed to embed a Youtube video ?
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I want to replace some text in the following code that users can insert in a CMS system:

<object width="480" height="385"><param name="movie" value="http://www.youtube.com/v/W8_Kfjo3VjU&hl=nl_NL&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/W8_Kfjo3VjU&hl=nl_NL&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="480" height="385"></embed></object>

As you can see this is from Youtube to embed a video.

I want to replace these strings in the code:

width="480"
height="385"

These strings can be variable. For instance someone can just insert: width="2480"

I want to avoid people from doing that.

Those 2 stings need to be replaced by:

width="320"
height="200"

Can anyone give some code to do that ?

Also any idea's how to do a basic validation that the code people insert is indeed to embed a Youtube video ?

ASP, vbscript -  regex replace

Active Server Pages (ASP) is Microsoft’s first server-side engine for dynamic web pages. ASP’s support of the Component Object Model (COM) enables it to access and use compiled libraries such as DLLs. It has been superseded by ASP.NET, but will be supported by Internet Information Services (IIS) through at least 2022.

A regular expression ("regex") is a sequence of characters that define a search pattern, mainly for use in pattern matching with strings, or string matching, i.e. "find and replace"-like operations. Regular expression processors are found in several search engines, search and replace dialogs of several word processors and text editors, and in the command lines of text processing utilities, such as sed and AWK. Many programming languages provide regular expression capabilities, some built-in, for example Perl, JavaScript, Ruby, AWK, and Tcl, and others via a standard library, for example .NET languages, Java, Python and C++ (since C++11). Most other languages offer regular expressions via a library.

Regular Expressions

VBScript (Visual Basic Scripting Edition) is an interpreted scripting language developed by Microsoft that is modeled on Visual Basic, but with some important differences. VBScript is commonly used for automating administrative and other tasks in Windows operating systems (by means of the Windows Script Host) and for server-side scripting in ASP web applications. It is also used for client-side scripting in Internet Explorer, specifically in intranet web applications.