code: function( code ) {
  		var script,
  				indirect = eval;
  
  		code = jQuery.trim( code );
  
  		if ( code ) {
  			// If the code includes a valid, prologue position
  			// strict mode pragma, execute code by injecting a
  			// script tag into the document.
  			if ( code.indexOf("use strict") === 1 ) {
  				script = document.createElement("script");
  				script.text = code;
  				document.head.appendChild( script ).parentNode.removeChild( script );
  			} else {
  			// Otherwise, avoid the DOM node creation, insertion
  			// and removal by using an indirect global eval
  				indirect( code );
  			}
  		}
  	}
docs: Evaluates a script in a global context