document.getElementById('t1').setAttribute("style", "background-color: green"); document.getElementById('t1').setAttribute("style", "background-color: red"); document.getElementById('t2').setAttribute("style", "background-color: red"); document.getElementById('t2').setAttribute("style", "background-color: green"); document.getElementById('t3').setAttribute("style", "background-color: red"); document.getElementById('t3').setAttribute("style", "background-color: green"); document.getElementById('t3').setAttribute("style", "background-color: red");

Onmouseover this should turn green