var x = confirm("Are you sure you want to send sms?");
if (x)
    return true;
else
    return false;  

<SCRIPT LANGUAGE="javascript">
function Del()
{
var r=confirm("Are you sure?")
if(r==true){return href;}else{return false;}
}
</SCRIPT>

你的链接:

<a href='edit_post.php?id=$myrow[id]'> Delete</a>

function ConfirmDelete()
{
  return confirm("Are you sure you want to delete?");
}


<input type="button" onclick="ConfirmDelete()">

HTML:

<a href="#" class="delete" data-confirm="Are you sure to delete this item?">Delete</a>

使用jQuery:

$('.delete').on("click", function (e) {
    e.preventDefault();

    var choice = confirm($(this).attr('data-confirm'));

    if (choice) {
        window.location.href = $(this).attr('href');
    }
});

这就是使用不引人注目的JavaScript和在HTML中保存确认消息的方式。

<a href="/delete" class="delete" data-confirm="Are you sure to delete this item?">Delete</a>

这是一个纯香草JS，兼容IE 9+:

var deleteLinks = document.querySelectorAll('.delete');

for (var i = 0; i < deleteLinks.length; i++) {
  deleteLinks[i].addEventListener('click', function(event) {
      event.preventDefault();

      var choice = confirm(this.getAttribute('data-confirm'));

      if (choice) {
        window.location.href = this.getAttribute('href');
      }
  });
}

看到它的行动:http://codepen.io/anon/pen/NqdKZq

onclick处理程序应该在函数调用后返回false。如。

onclick = " ConfirmDelete ();返回错误;" >