OnChange Reset Value And Set Focus

I know this must be pretty basic but I can't get it to work. I've written validation for a text field- it should have no periods in it. I want to reset the value of the field then give the field focus, if it has a period. Here is my code:

Quote:


function checkTitle(field) {
var titleFilter=/./;
if (field.value.match(titleFilter)) {
alert("Please enter your title without periods.");
field.value=''
field.focus();
return false;
}
else {
alert("good");
}
}


I call it from onChange. It resets the value but the focus goes to the next field (or stays there I guess.) Is there a way to set the focus on the same field?

PS I should mention, this form has disabled the "Enter" key and I can't change that behavior. I've been tbbing between fields, and it is when I tab that I am experiencing the problem.