Php 密码不匹配时禁用表单提交按钮

我试图找出应该在哪里包含一个js代码，当密码不匹配时，我会禁用表单提交按钮

html:

也许我把$（“#btnSignUp”）.prop（“disabled”，true）放错地方了；代码？

试试看

$("#btnSignUp").attr("disabled", "disabled");

这应该行得通

if (this.field1.value != "" && this.field1.value == this.field2.value) {
 r.innerHTML = this.match_html;
  $("#btnSignUp").removeAttr("disabled");

} else {
 r.innerHTML = this.nomatch_html;
  $("#btnSignUp").attr("disabled", "disabled");
}

---

既然您使用的是jQuery，为什么您需要为不支持

getElementById

的浏览器提供自己的保护？

function verifynotify(field1, field2, result_id, match_html, nomatch_html) {
 this.field1 = field1;
 this.field2 = field2;
 this.result_id = result_id;
 this.match_html = match_html;
 this.nomatch_html = nomatch_html;

 this.check = function() {

   // Make sure we don't cause an error
   // for browsers that do not support getElementById
   if (!this.result_id) { return false; }
   if (!document.getElementById){ return false; }
   r = document.getElementById(this.result_id);
   if (!r){ return false; }

   if (this.field1.value != "" && this.field1.value == this.field2.value) {
     r.innerHTML = this.match_html;
      $("#btnSignUp").prop("disabled", false);

   } else {
     r.innerHTML = this.nomatch_html;
      $("#btnSignUp").prop("disabled", true);

   }
 }
}

$("#btnSignUp").attr("disabled", "disabled");

if (this.field1.value != "" && this.field1.value == this.field2.value) {
 r.innerHTML = this.match_html;
  $("#btnSignUp").removeAttr("disabled");

} else {
 r.innerHTML = this.nomatch_html;
  $("#btnSignUp").attr("disabled", "disabled");
}