title: How to make Date drop down menu on webpage
body: <p>I have a web server with PHP and I have a few files under certain folders I need to be able to select. The file names are in the format of "YYYY-MM-DD_XXXXXXX.php". Y stands for Year, M stands for month, D stands for date. What I need to do is make a dynamic drop down menu with the date for which there is certain file in the folder.  For example. There are two files: 2013-01-01_xxxxx.php and 2013-01-07_xxxx.php, In this way there should be two options available in the drop down list which is "2013-01-01" and "2013-01-07". And once I choose one of them, correspond file will be displayed below in the webpage. I don't know how to make such drop down menu.</p>