--- /dev/null
+(function() {
+
+var parts = document.location.search.slice( 1 ).split( "&" ),
+ length = parts.length,
+ i = 0,
+ current,
+ version,
+ url;
+
+for ( ; i < length; i++ ) {
+ current = parts[ i ].split( "=" );
+ if ( current[ 0 ] === "jquery" ) {
+ version = current[ 1 ];
+ break;
+ }
+}
+
+if ( version === "git" ) {
+ url = "http://code.jquery.com/jquery-git.js";
+} else {
+ url = "../../jquery-" + ( version || "1.9.1" ) + ".js";
+}
+
+document.write( "<script src='" + url + "'></script>" );
+
+}() );