It will be at least two days before Canadians know if they will go to the polls this spring, but the Conservatives have already released a series of radio attack ads targeting the Liberals.

The ads declare Prime Minister Paul Martin to be desperate and dishonest, and accuse the Liberals of corruption.

The Conservatives are also planning to unveil their election platform, according to The Globe and Mail. It is expected to include Liberal-oriented social initiatives, such as the increasing foreign aid to 0.7 per cent of the gross domestic product.

As for the ads, released Monday, they accuse Martin of being "willing to do anything to hang on to power" and "trying to avoid you -- the voter."

In one ad, a man's voice says: "Paul Martin says 'wait.' For what? More waste? More corruption?"

Conservative MP James Rajotte, appearing on CTV's Canada AM on Tuesday, said the party thinks the government will likely fall Thursday night.

"And so we're just sort of preparing for that, launching some ads in advance of that."

The ads come as Martin calls for more civility in the House of Commons.

"There prevails today a culture in Parliament in which reputations are casually smeared, and anger and personal insult are the rhetorical devices of choice.

"We've got to change this," the prime minister said Monday after signing a multimillion-dollar child-care deal with Nova Scotia.

Martin also asked that the Conservatives allow the budget bill to pass on Thursday. If the opposition parties don't vote in favour of the bill, it will be considered a vote of non-confidence, triggering an election.

The budget bill includes many measures that could possibly die if the legislation does not pass. That includes the Atlantic offshore revenue deals, worth billions.

Two Conservative MPs from Newfoundland and Labrador, Norm Doyle and Loyola Hearn, are under pressure to break ranks and support the federal budget to make sure the offshore revenue deals don't die.

Hearn rose in the House of Commons on Monday to demand the offshore deals be taken out of the budget and introduced as separate legislation.

Rajotte said Doyle and Hearn "have given every indication to us that they will be certainly voting with us against the budget."

Every vote will be needed on both sides. The Conservatives and the Bloc Quebecois, voting together, have 153 votes. The Liberals and the NDP have 150.

That leaves much of weight of the vote on the three Independent MPs -- Carolyn Parrish, Chuck Cadman and David Kilgour.

Parrish has said she will vote with the Liberals, Cadman is undecided and it's still uncertain how Kilgour will vote.

If all three vote with the Liberals, the Speaker of the House, Peter Milliken, would be the tie breaker. He would likely vote with the Liberals.