Look at your code fragment: now, how do you include quotes in a C# string? Not like that...
Try this:
Response.Write(@"<script language='javascript'>document.getElementById('drop1')style.display = 'block';</script>");
Ignore this - it's a bug in the syntax colouriser
Please do not delete - I need to report it and leaving this here will help...
Response.Write(@"<script language='javascript'>document.getElementById('drop1')style.display = 'block';</script>");