[英]Javascript Onclick event only works once
如果遇到某些变量,此javascript会调用一个倒计时的计时器。 倒计时发生时,它会隐藏原始按钮,然后将其替换为另一个按钮,以便在倒计时期间无法再次调用该事件。 但是,倒计时结束后,再次单击该按钮将无任何反应。
<div id="set_upgrade">
<input id="upgrade" type="button" value="Upgrade" />
</div>
<div id="set_upgrading" style="display:none">
<input id="upgrading" type="button" value="Upgrade" />
</div>
<br><br><br><br>
<p id="countdown_timer"></p>
<script>
document.getElementById("countdown_timer").innerHTML = ("<span id='countdown' class='timer' style='display:block'></span>");
document.getElementById('upgrade').onclick=timer;
document.getElementById('upgrading').onclick=alert_box;
function display_timer(){
};
function alert_box(){
alert("You are currently upgrading this module.");
};
var currently_upgrading = 0;
var current_ore = 398;
var current_crystal = 398;
var upgradeTime = 3;
var seconds = upgradeTime;
var su = document.getElementById('set_upgrade');
var su2 = document.getElementById('set_upgrading');
var su3 = document.getElementById('countdown');
function timer() {
if(currently_upgrading == 1){alert('You are already upgrading a module.');return;}
if(current_ore <= 299){alert('You need more ore.');return;}
if(current_crystal <= 299){alert('You need more crystal.');return;}
su.style.display = "none";
su2.style.display = "block";
su3.style.display = "block";
var days = Math.floor(seconds/24/60/60);
var hoursLeft = Math.floor((seconds) - (days*86400));
var hours = Math.floor(hoursLeft/3600);
var minutesLeft = Math.floor((hoursLeft) - (hours*3600));
var minutes = Math.floor(minutesLeft/60);
var remainingSeconds = seconds % 60;
if (remainingSeconds < 10) {
remainingSeconds = "0" + remainingSeconds;
}
document.getElementById('countdown').innerHTML = days + ":" + hours + ":" + minutes + ":" + remainingSeconds;
if (seconds == 0) {
su.style.display = "block";
su2.style.display = "none";
su3.style.display = "none";
} else {
seconds--;
setTimeout(timer, 1000);
}
}
</script>
首先,您不需要每次都需要打开和关闭<script>
标记,然后不必执行onclick="alert_box();"
,以这种方式尝试。
function alert_box(){
alert("You are currently upgrading this module.");
};
document.getElementById('upgrading').onclick=alert_box;
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