filtering low-quality reads with FASTA format + quality file (qc_filter_fasta_qual)

This program removes low quality DNA reads (for 454 data only). Here quality is defined as Q=-10*p*log(p), where p is base-calling error rate.
Inputs:
(1) DNA FASTA file (required)
(2) DNA quality file (required)
(3) Email address (optional)
(4) Parameters (optional)
Outputs:
output.zip(including the following three files
(1) README.txt: description of the three output files
(2) output.1.Summary.txt: summary file about filtering
(3) output.1.filtered.fasta: high-qualtiy FASTA file
Usage of web server:
(1) Select the DNA fasta file in user's local computer. (required)
(2) Fill in user's email adress. (optional)
(3) Fill in parameters. (optional, modifiy it according to user's requirement)
(4) Click "Submit" button. (required)
Sequence file to upload (required):
Quality file to upload (required):
Email (optional):
Parameters
show description
1st parameter: minimum average quality score for a read (default=21)
2nd parameter: minimum length (default=65)
EXAMPLE
Sequence file to upload (required): input.fasta
Quality file to upload (required): qualityfile.txt
Email (optional): you@example.com
Parameters 21 65
show description
1st parameter: minimum average quality score for a read (default=21)
2nd parameter: minimum length (default=65)
Show an example
Submitting......
Program/Database Version
Program: qc_filter_fasta_qual 1.0
Database: N/A