Users will be able to submit questions on MySpace instant messenger and watch a Web cast of the events to be held on college campuses from September through December, the site said in a statement today. Candidates will appear individually, not together.

"Our users will have the chance to get direct answers to the questions they want to ask — unfiltered," Chris DeWolfe, chief executive officer of MySpace, said in the statement.

Social-networking sites such as MySpace and Facebook are working to promote young people's involvement in politics. According to a Harvard poll, voter turnout among those 18 to 24 grew to 47 percent in the 2004 election from 36 percent in 2000.

Democratic presidential candidates planning to participate include Senators Hillary Clinton of New York, Barack Obama of Illinois and former North Carolina Senator John Edwards, according to MySpace.

Former New York Mayor Rudolph Giuliani, Senator John McCain of Arizona and former Massachusetts Governor Mitt Romney are among the Republican candidates who have said they will take part, MySpace said. Twelve candidates in all have agreed to appear, MySpace said.