Url can be a function as well as string

Author: mihaild

example.html

@@ -17,7 +17,9 @@
 		<script type="text/javascript">
 			$(function() {
 				$("#upload_field").html5_upload({
-					url: '/',
+					url: function() {
+						return prompt("Url", "/");
+					},
 					onStart: function(event, total) {
 						return confirm("You are trying to upload " + total + " files. Are you sure?");
 					},

jquery.html5_upload.js

@@ -110,7 +110,7 @@
 						upload_file(number+1);
 					}
 				};
-				xhr.open("post", options.url, true);
+				xhr.open("post", typeof(options.url) == "function" ? options.url() : options.url, true);
 				xhr.setRequestHeader("Cache-Control", "no-cache");
 				xhr.setRequestHeader("X-Requested-With", "XMLHttpRequest");
 				xhr.setRequestHeader("X-File-Name", file.fileName);