Javascript 仅当输入有效时显示按钮 var useridtologin=document.getElementById(“userid”).innerHTML; var passwordtologin=document.getElementById(“userpasword”).innerHTML; var buttonshow=document.getElementById(“登录按钮”);
正如您所看到的,我的按钮被设置为“隐藏”,我希望它仅在用户输入“userid”中的1111和“userpassword”中的smith时显示在屏幕上Javascript 仅当输入有效时显示按钮 var useridtologin=document.getElementById(“userid”).innerHTML; var passwordtologin=document.getElementById(“userpasword”).innerHTML; var buttonshow=document.getElementById(“登录按钮”);,javascript,function,authentication,button,visual-studio-2019,Javascript,Function,Authentication,Button,Visual Studio 2019,正如您所看到的,我的按钮被设置为“隐藏”,我希望它仅在用户输入“userid”中的1111和“userpassword”中的smith时显示在屏幕上 函数myFunction(){ var buttonshow=document.getElementById(“登录按钮”); var useridtologin=document.getElementById(“userid”); var passwordtologin=document.getElementById(“用户密码”); if(u
函数myFunction(){
var buttonshow=document.getElementById(“登录按钮”);
var useridtologin=document.getElementById(“userid”);
var passwordtologin=document.getElementById(“用户密码”);
if(useridtologin&&passwordtologin){
if(useridtologin.value==“1111”&&passwordtologin.value==“smith”){
buttonshow.style.display=“块”;
}
}
}
函数myFunction(){
var buttonshow=document.getElementById(“登录按钮”);
var useridtologin=document.getElementById(“userid”);
var passwordtologin=document.getElementById(“用户密码”);
if(useridtologin&&passwordtologin){
if(useridtologin.value==“1111”&&passwordtologin.value==“smith”){
buttonshow.style.display=“块”;
}
}
}
<input id="userid" type="text" placeholder="Enter Your ID" style="padding: 9px; margin: 9px; border-style: solid; font-size: large;" />
<input id="userpassword" type="text" placeholder="Enter Your Password" style="padding: 9px; margin: 9px; border-style: solid; font-size: large;"/>
<input id="loginbutton" type="button" value="Login" style="padding: 4px; margin: 11px; font-size: large; background-color: #000000; color: #FFFFFF;" **hidden="hidden"** />
var useridtologin = document.getElementById("userid").innerHTML;
var passwordtologin = document.getElementById("userpasword").innerHTML;
var buttonshow = document.getElementById("loginbutton");