code: function( cb ){
  			var resolvedHref = ss.href;
  			var i = sheets.length;
  			while( i-- ){
  				if( sheets[ i ].href === resolvedHref ){
  					return cb();
  				}
  			}
  			setTimeout(function() {
  				onloadcssdefined( cb );
  			});
  		}
docs: A method (exposed on return object for external use) that mimics onload by polling document.styleSheets until it includes the new sheet.