javascript attach window event, javascript event, js event

if (window.attachEvent)
{
window.attachEvent("onresize", ActualUserResize);
window.attachEvent("onload", ActualUserResize);
}

if (window.addEventListener)
{
window.addEventListener("resize", ActualUserResize, true);
window.addEventListener("load", ActualUserResize, true);
}
function ActualUserResize()
{
//Your code here!
}