// are we in the right place?
if ( location.href.indexOf( 'etsy.com/create_listing2.php' ) > -1 ) { 
    d = document;
    // get the current tags and make them nice to read
    v = d.forms[ 2 ].tagInput.value.replace( /\./g, ', ' );
    v = v.replace( /_/g, ' ' );
    // prompt for new tags with the existing ones as the default
    if ( s = prompt( 'Tags', v ) ) {
        // we have tags, turn them into an array
        t = s.split( /,\s*/ );
        // set up some short references
        f = d.forms[ 1 ];
        a = allTagPointers;
        // remove existing tags
        while( a.length > 1 ) {
            removeTag( a[ 1 ] );
        }
        // find the first tag in the drop-down and select it
        y = t[ 0 ].replace( / /g, '_' );
        s = f.getElementsByTagName( 'select' )[ 0 ];
        u = s.options;
        for ( o = 0; o < u.length; o++ ) {
            if( u[ o ].value == y ) {
                s.selectedIndex = o;
                mainCategorySelector( y )
            }
        }
        // add the remaining tags
        for ( a = 1; a < t.length; a++ ) addTag( t[ a ] )
    }
}