Strings and Dates

I have an ASP page that searches for three different values in a Database. The first is that ValueDate the second is BeforeValueDate and the third is AfterValueDate. I have the ValueDate as a String in my SQL database.
I am trying to find out how to find the values for dates before a given ValueDate and after a given ValueDate.

Any Help is really appreciated with this. I am using JScript .

Thanks
JK

Use the CONVERT() function in SQL Server to convert the string to a date and do your compares that way.