LONDON (AFP) - Police say they plan to post pictures of missing toddler Madeleine McCann in the Second Life virtual world.

Investigators are in talks with Second Life to prominently display pictures of the missing four-year-old who vanished in Portugal nearly six weeks ago, said Jim Gamble of the Child Exploitation and Online Protection Centre (CEOP).

Madeleine's parents -- Gerry and Kate McCann -- are also trying to convince search engine goliath Google to display their daughter's eyes in the double o's in its name on its site.

The couple told AFP on Sunday that Google had yet to respond to their request.

The McCanns are also pushing Harry Potter novellist JK Rowling to include bookmarks featuring Madeleine's picture in the seventh and last installment of the wildly popular books, set to go on sale next month.

The couple, who in recent weeks have been on a European tour to appeal for information about their daughter's whereabouts, are currently in Morocco to gear up support from authorities there to find their daughter, who disappeared on May 3 in the southern Portuguese resort town of Praia da Luz.

Moroccan authorities have assured the McCanns they "will do everything to help to find Madeleine," the girl's father told a press conference in Rabat on Monday.

"Given the lack of evidence that she is still in Portugal, Kate and I, we have to take into consideration all the possibilities that she moved out of Portugal into Spain and quite possibly could have been brought to Morocco," he said.

"That is the main reason for coming here," he added, asking the Moroccan public to call in any tips on his daughter's whereabouts to police at 0 8000 25 11.

He denied that the visit to Morocco was linked to a tip last month from a Norwegian woman, Mari Olli, who said she had seen Madeleine in the south of the country.

Olli, 45, who had been vacationing in Morocco, told Portuguese daily Correio da Manha that she had seen the four-year-old girl in a service station south of Marrakesh six days after she disappeared.

"She was wearing light blue pajamas" and had asked a man with her "who could not have been her father" if she would soon see her mother, Olli said.