[jQuery] Select radio button item

I have a radio button group with 4 items, each one has a value (1,2,3,''). On click in a button of my form I would like the check the radio button with '' value. I supose that I can access to the radio group ussing $("@idRaio") but then I don't know how can access to the item with value='' Any

[jQuery] Select radio button item

I have a radio button group. I would like "check" an item when a user click on button. The radio group has 3 items. I know that I can get the radio button group using: jQuery("#idRadioButton").click() However I dont' know how select an item specifically (for exemple which has value='') thanks