alert then submit

Hi,

how can i display the alert message then submit the form?  the code below is working fine but if i add the line"{alert("You had selected correct answer D.")}" then it shows error for Object expected.  The reason i do this because i want it to display the meesage to let users know that they had selected the correct answer first then submit the form afteward.  Can anyone please help ?  - thanks

function checkQ() {

chosen = ""
len = document.form26.benchmark.length

for (i = 0; i <len; i++) {
if (document.form26.benchmark.checked) {
chosen = document.form26.benchmark.value
}
}

if (chosen == "D")
{alert("You had selected correct answer D.")}
{
document.getElementById("form26").submit();
}
else {
alert("You chose the wrong value. Please try again.")
}
}