php如何设置删除确认

<a href="javascript:if(confirm('确认删除吗?'))window.location='del.asp'">删除</a>

<script language="javascript">
<!--
function del_sure(){
var gnl=confirm("你真的确定要删除吗?");
if (gnl==true){
return true;
}
else{
return false;
}
}
--->
</script>
//调用
<a href="del.asp?id=<%=rs("id")%>" onclick="javascript:del_sure()">删除</a>

<script language="javascript">
function confirmDel(str){
return confirm(str);
}
</script>
 
<a href="delete.asp" onclick="return confirmDel('确定要删除吗')">删除</a>