Several scripting languages may be used in ASP. However, 
the default scripting language (in classic ASP) is VBScript:

yes, we can use more than 40 langauages in asp.net..some of 
the common languages are c#,VB,J#,C++ etc

In ASP, we r using VBScript and JavaScript. For client side 
scripting we r using javascript and for server side, we r 
using VBScript.When a ASP page s sent to server,that 
VBscript s executed at server.and in the case of 
javascript,it s executed at the client itself.we can see 
the javascript code by taking the "view source code"option 
of each ASP webpage

There r 44 languages support ASP.Net,thry r 
C,C++,JAVA,J2EE,J2ME,C#.NET,VB.NET,ASP.NET,J#.NET,VC++,BASIC
,COBOL,PASCAL,FORTRAN,F7.7,PHP,PERL,CGI,ISAPI,HTML,DHTML, 
SGML,XHTML,XML,SCHEMA,DTD'S,CSS,JAVA SCRIPT,VB 
SCRIPT,ASB,AJAS,SMALL TALK, ADA,LOTUS,RUBY,DELPHI,APL, 
ALGOL,CPL,BCPL,B,PYTHON,EIFFIL and VB.