Javascript 将函数值传递到innerhtml div中的输出
大家好,我正在尝试将验证函数的返回值传递给文档html部分的innerhtml。由于某种原因,它不起作用。。。。谢谢你的帮助Javascript 将函数值传递到innerhtml div中的输出,javascript,html,Javascript,Html,大家好,我正在尝试将验证函数的返回值传递给文档html部分的innerhtml。由于某种原因,它不起作用。。。。谢谢你的帮助 function validate(form) { fail = validateName(form.name.value) fail += validateEmail(form.email.value) fail += validateCity(form.city.value) if (fail == "") return true
function validate(form) {
fail = validateName(form.name.value)
fail += validateEmail(form.email.value)
fail += validateCity(form.city.value)
if (fail == "") return true
else { alert(return document.getElementById('#errors').innerHTML=fail;}); return false}
}
function validateName(field) {
if (field == "") return "No name was entered.\n"
else if (field.length < 3) return "Name must be at least 3 characters.\n"
else if (!/[a-zA-Z ]*$/.test(field)) return "Name can only have alphabetical characters.\n"
return ""
}
function validateEmail(field) {
if (field == "") return "No email was entered.\n"
else if (!((field.indexOf(".") > 0) && (field.indexOf("@") > 0)) || /[^a-zA-Z0-9.@_-]/.test(field)) return "The email address is invalid.\n"
return ""
}
function validateCity(field) {
if (field == "") return "No city was entered.\n"
else if (field.length < 3) return "City must be at least 3 characters.\n"
else if (!/[a-zA-Z ]*$/.test(field)) return "City can only have alphabetical characters.\n"
return ""
}
<form action="<?php echo $editFormAction; ?>" name="subscribe" onSubmit="return validate(this)" id="subscribe" method="POST">
<div id="errors"></div>
<input name="name" autocomplete="off" required pattern="[a-zA-Z ]*$" title="Please enter only alphabetic characters" type="text" id="name" placeholder="Your name"/>
<input name="email" autocomplete="off" required id="email" type="email" title="Please enter your email address" placeholder="Your email address"/>
<input name="city" autocomplete="off" required pattern="[a-zA-Z ]*$" title="Please enter only alphabetic characters" id="city" placeholder="Your city"/>
<section id="buttons">
<input type="reset" name="reset" id="resetbtn" class="resetbtn" value="Reset">
<input type="submit" name="submit" id="submitbtn" class="submitbtn" tabindex="7" value="Submit this!">
<br style="clear:both;">
</section>
函数验证(表单){
fail=validateName(form.name.value)
fail+=validateEmail(form.email.value)
fail+=validateCity(form.city.value)
如果(fail==“”)返回true
else{alert(return document.getElementById('#errors').innerHTML=fail;});return false}
}
函数validateName(字段){
如果(字段==“”)返回“未输入名称。\n”
else if(field.length<3)返回“名称必须至少包含3个字符。\n”
否则如果(!/[a-zA-Z]*$/.test(field))返回“名称只能包含字母字符。\n”
返回“”
}
函数validateEmail(字段){
如果(字段==“”)返回“未输入电子邮件。\n”
否则如果(!((field.indexOf(“.”>0)和(field.indexOf(“@”)>0))| |/[^a-zA-Z0-9.@-]/.test(field))返回“电子邮件地址无效。\n”
返回“”
}
函数有效性(字段){
如果(字段==“”)返回“未输入任何城市。\n”
else if(field.length<3)返回“城市必须至少包含3个字符。\n”
否则如果(!/[a-zA-Z]*$/.test(field))返回“城市只能有字母字符。\n”
返回“”
}
使用错误代替#错误并从警报
中删除返回
if (fail == "") return true;
else {
//use innerText in place of innerHTML if #errors is not a div
document.getElementById('errors').innerHTML=fail; use errors in place of #errors
alert(fail);
return false
}
对于道德编码,您可能需要避免在函数或方法的参数内返回函数值:
注意这一行:
else { alert(return document.getElementById('#errors').innerHTML=fail;});
返回
作为警报()。。。。那似乎不好
这会导致语法错误
你讨厌分号吗?@JonathandeM。你为什么这么说?Ctr+A
然后Ctr+c
你的HTML代码然后Ctr+v
把它们放在这里,这样我们也可以看到你的HTML代码。刚刚添加了它。谢谢是的,它工作得很好。如何在fail语句之后放置换行符。非常感谢@Rohan KumarUse
代替\n
或创建失败消息的数组,并使用
像失败加入(“
”)那样加入代码>非常感谢@RohanKumar