domManip dom操作方法

domManip: function( args, table, reverse, callback ) {
		var clone = this.length > 1, elems;

		return this.each(function(){
			if ( !elems ) {
				elems = jQuery.clean( args, this.ownerDocument );

				if ( reverse )
					elems.reverse();
			}

			var obj = this;

			if ( table && jQuery.nodeName( this, "table" ) && jQuery.nodeName( elems[0], "tr" ) )
				obj = this.getElementsByTagName("tbody")[0] || this.appendChild( this.ownerDocument.createElement("tbody") );

			var scripts = jQuery( [] );

			jQuery.each(elems, function(){
				var elem = clone ?
					jQuery( this ).clone( true )[0] :
					this;

				// execute all scripts after the elements have been injected
				if ( jQuery.nodeName( elem, "script" ) )
					scripts = scripts.add( elem );
				else {
					// Remove any inner scripts for later evaluation
					if ( elem.nodeType == 1 )
						scripts = scripts.add( jQuery( "script", elem ).remove() );

					// Inject the elements into the document
					callback.call( obj, elem );//具体操作在回调函数中
				}
			});

			scripts.each( evalScript );
		});
	}
};