(function( $j ) {
 
    // plugin definition
    $j.fn.overlabel = function( options ) {
 
        // build main options before element iteration
        var opts = $j.extend( {}, $j.fn.overlabel.defaults, options );
 
        var selection = this.filter( 'label[for]' ).map( function() {
 
            var label = $j( this );
            var id = label.attr( 'for' );
            var field = document.getElementById( id );
 
            if ( !field ) return;
 
            // build element specific options
            var o = $j.meta ? $j.extend( {}, opts, label.data() ) : opts;
 
            label.addClass( o.label_class );
 
            var hide_label = function() { label.css( o.hide_css ) };
            var show_label = function() { this.value || label.css( o.show_css ) };
 
            $j( field )
                 .parent().addClass( o.wrapper_class ).end()
                 .focus( hide_label ).blur( show_label ).each( hide_label ).each( show_label );
 
            return this;
 
        } );
 
        return opts.filter ? selection : selection.end();
    };
 
    // publicly accessible defaults
    $j.fn.overlabel.defaults = {
 
        label_class:   'overlabel-apply',
        wrapper_class: 'overlabel-wrapper',
        hide_css:      { 'text-indent': '-10000px' },
        show_css:      { 'text-indent': '0', 'cursor': 'text' },
        filter:        false
 
    };
 
} )( jQuery );