我想使警报消息显示我输入的表单的数据。但文本元素的数据不能正常工作。
<script type="text/javascript">
function showUserData(){
category = document.getElementById("category").value;
regicon = "";
var obj=document.getElementsByName("register");
for(idx in obj){
if(obj[idx].checked){
regicon += obj[idx].value;
}
}
title = document.getElementById("title").value;//here is the problem
author = document.getElementById("author").value;
email = document.getElementById("email").value;
content = document.getElementById("content").value;
password = document.getElementById("password").value;
coverdate = document.getElementById("coverdate").value;
contentimage = document.getElementById("contentimage").value;//
time_result = new Date();//기사등록일은 date()
window.alert("카테고리: "+category + "\n"
+ "등록상태: " + regicon + "\n"
+ "제목: " + title + "\n"
+ "이메일: " + email + "\n"
+ "기자: " + author + "\n"
+ "내용: " + content + "\n"
+ "취재일: " + coverdate + "\n"
+ "기사등록일: " + time_result + "\n");
}
</script>
当我运行代码时,警报在标题值处显示“未定义”。我认为标题值没有初始化所以我试过了
title = "";
这不是解决方案。如何才能正常运行该功能
你创建了一个title
variable?在我看来,你忘了在标题变量之前加上“var”或“const”。