Auto-populate required name field

I have been trying the below code without any success.  Then schema name of the field is 'cei_name'.

Any thoughts on what I'm missing here or alternate code recommendations?  Thanks

[code lang=”js”]

function name()

{ var now = new Date();

if (crmForm.all.cei_name.DataValue==null)

{

crmForm.all.cei_name.DataValue=(now.toString());

}

}

[/code]