This is not ending the submission of the form. What am I missing?

Code:
<script language="JavaScript">
<!--
	function addAnother(form){
		if(form.ckAddAnother.checked)
		{
			if(form.LName.value != "")
			{
			LName = form.addITSS.LName;
			}
			else
			{
			alert("Plase fill in a last name!");
			form.LName.focus();
			return(false);
			}

			if(form.FName.value != "")
			{
			FName = form.FName.value;
			}
			else
			{
			alert("Plase fill in a first name!");
			form.FName.focus();
			return(false);
			}

			if(form.Region.value != "")
			{
			Region = form.Region.value;
			}
			else
			{
			alert("Plase fill in a region!");
			form.Region.focus();
			return(false);
			}

			if(form.administration.value != "")
			{
			administration = form.administration.value;
			}
			else
			{
			alert("Plase fill in an Administration!");
			form.administration.focus();
			return(false);
			}

			if(form.title.value != "")
			{
			title = form.title.value;
			}
			else
			{
			alert("Plase fill in a title!");
			form.title.focus();
			return(false);
			}
		}
	return(true);
	}
-->
</script>