我有这个脚本,它解码url并使用url参数设置asp字段的值(?lastname = Somebody& phone = 12345)
<script>
var urlParams;
(window.onpopstate = function () {
var match,
pl = /\+/g, // Regex for replacing addition symbol with a space
search = /([^&=]+)=?([^&]*)/g,
decode = function (s) { return decodeURIComponent(s.replace(pl, " ")); },
query = window.location.search.substring(1);
urlParams = {};
while (match = search.exec(query))
urlParams[decode(match[1])] = decode(match[2]);
})();
lastname = urlParams["lastname"];
document.getElementById('ctl00_maincontent_FormView1_FirstNameTextBox').value = lastname;
</script>
如何检查数组元素是否为空,只是将该字段留空,而现在我得到了未定义。我有多个要检查的参数(姓氏,姓名,电话等)
感谢。
答案 0 :(得分:0)
你可以做类似的事情
lastname = urlParams["lastname"] || '';
这提供了一个&#39;默认&#39;如果它未定义