帮忙合并一JavaScript功能

Question

<script>
<!--
 function check_form(){
  var form=document.form1;  if(form.t1.value==""){
    alert("xxx");
    form.t1.focus();
    return false;
  }
  if(form.sel.value==""){
    alert("xxxx");
    form.sel.focus();
    return false;
  }
  showSending();
}function showSending() {
sending.style.visibility="visible";
}
-->
</script>

Answer 1

<script>
<!--
 function check_form(){
  var form=document.form1;  if(form.t1.value==""){
    alert("xxx");
    form.t1.focus();
    return false;
  }
  if(form.sel.value==""){
    alert("xxxx");
    form.sel.focus();
    return false;
  }
sending.style.visibility="visible";
}
-->
</script>

Answer 2

<script>
 function check_form(){
  var form=document.form1;  if(form.t1.value==""){
    alert("xxx");
    form.t1.focus();
    return false;
  }
  if(form.sel.value==""){
    alert("xxxx");
    form.sel.focus();
    return false;
}
 showSending
}
</script><script language=javascript>
<!--
function showSending() {
sending.style.visibility="visible";
}
-->
</script>