How to get filePath for seven cows upload

  node.js, question

Chrome’s path is c: fakepatfilename.xxx. how can I get the path to upload files, please

Under reference

<script type="text/javascript">
 var Sys = {};
 var ua = navigator.userAgent.toLowerCase();
 var s;
 (s = ua.match(/msie ([\d.] plus)/)?  Sys.ie = s[1] :
 (s = ua.match(/firefox\/([\d.] plus)/)?  Sys.firefox = s[1] :
 (s = ua.match(/chrome\/([\d.] plus)/)?  Sys.chrome = s[1] :
 (s = ua.match(/opera.([\d.] plus)/)?  Sys.opera = s[1] :
 (s = ua.match(/version\/([\d.] plus). *safari/)?   Sys.safari = s[1] : 0;
 //Test below
 If (Sys.ie) document.write('IE:' plus Sys.ie);
 If (Sys.firefox) document.write ('firefox:' plus sys.firefox);
 If (Sys.chrome) document.write ('chrome:' plus sys.chrome);
 If (Sys.opera) document.write ('opera:' plus sys.opera);
 If (Sys.safari) document.write ('safari:' plus sys.safari);
 </script>