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//手动触发表单检查
document.forms["myform"].reportValidity();
//https://developer.mozilla.org/en-US/docs/Web/API/HTMLFormElement/reportValidity

//自定义提示语言
windows.onload = function() {
          var p2 = document.forms["my_f1"].passwd2;
          p2.oninvalid = function() {
              this.setCustomValidity("密码不一致，请重新输入");
              //reset
              this.setCustomValidity("");
          }
          p2.oninput = function() {
              this.setCustomValidity("");
          }

      }

$("#form").submit(function(e){
  
      if(e.target.checkValidity()){
        
      }
      return false;
})