elem = document.getElementById(match[2]); 
if (elem && elem.parentNode) { 
  this.length = 1; 
  this[0] = elem; 
} 
 
this.context = document; 
this.selector = selector; 
return this; 

each: function( callback, args ) { 
        return jQuery.each( this, callback, args ); 
    } 

hide: function() { 
        return showHide( this ); 
    }, 
 function showHide( elements, show ) {var elem, display, 
        values = [], 
        index = 0, 
        length = elements.length; 
    for ( ; index < length; index++ ) { 
        elem = elements[ index ]; 
        if ( !elem.style ) { 
            continue; 
        } 
        values[ index ] = jQuery._data( elem, "olddisplay" ); 
        if ( show ) { 
            // Reset the inline display of this element to learn if it is 
            // being hidden by cascaded rules or not 
            if ( !values[ index ] && elem.style.display === "none" ) { 
                elem.style.display = ""; 
            } 
            // Set elements which have been overridden with display: none 
            // in a stylesheet to whatever the default browser style is 
            // for such an element 
            if ( elem.style.display === "" && isHidden( elem ) ) { 
                values[ index ] = jQuery._data( elem, "olddisplay", css_defaultDisplay(elem.nodeName) ); 
            } 
        } else { 
            display = curCSS( elem, "display" ); 
            if ( !values[ index ] && display !== "none" ) { 
                jQuery._data( elem, "olddisplay", display ); 
            } 
        } 
    } 
    // Set the display of most of the elements in a second loop 
    // to avoid the constant reflow 
    for ( index = 0; index < length; index++ ) { 
        elem = elements[ index ]; 
        if ( !elem.style ) { 
            continue; 
        } 
        if ( !show || elem.style.display === "none" || elem.style.display === "" ) { 
            elem.style.display = show ? values[ index ] || "" : "none"; 
        } 
    } 
    return elements; 
} 

bind: function( types, data, fn ) { 
        return this.on( types, null, data, fn ); 
    }, 

on: function( types, selector, data, fn, /*INTERNAL*/ one ) { 
        // 此部分代碼省略 
        return this.each( function() { 
            jQuery.event.add( this, types, fn, data, selector ); 
        }); 
    },