使用js實現按鈕控制文本框加1減1應用于小時+分鐘

2019-11-20 21:30:05

字體：大中小

來源：轉載

供稿：網友

time.html代碼：

 
<!doctype html> 
<html lang="en"> 
<head> 
<meta charset="UTF-8"> 
<meta name="Generator" content="EditPlus®"> 
<meta name="Author" content=""> 
<meta name="Keywords" content=""> 
<meta name="Description" content=""> 
<title>Document</title> 
<script type="text/javascript" src="jquery-1.8.2.min.js"></script> 
<script type="text/javascript" src="time.js"></script> 
</head> 
<body> 
<input type="button" value="小時加" onClick="add_hour();"> 
<input type="text" value="00" id="hour"> 
<input type="button" value="小時減" onClick="sub_hour();"> 
<br/> 
<br/> 
<input type="button" value="分鐘加" onClick="add_minute();"> 
<input type="text" value="00" id="minute"> 
<input type="button" value="分鐘減" onClick="sub_minute();"> 
</body> 
</html> 

time.js代碼：

復制代碼代碼如下:

 
function add_num(a,b,c){ 

if(c<a){ 
c++; 
} 
else{ 
c=b; 
} 
if(c<=9&&c>=0){ 
c="0"+c; 
} 
return c; 
} 
function sub_num(a,b,c){ 
if(c>a){ 
c--; 
} 
else{ 
c=b; 
} 
if(c<=9&&c>=0){ 
c="0"+c; 
} 
return c; 
} 
function add_hour(){ 
var current_num=$("#hour").attr("value"); 
current_num=add_num(23,0,current_num); 
$("#hour").attr("value",current_num); 
} 
function sub_hour(){ 
var current_num=$("#hour").attr("value"); 
current_num=sub_num(0,23,current_num); 
$("#hour").attr("value",current_num); 
} 
function add_minute(){ 
var current_num=$("#minute").attr("value"); 
current_num=add_num(59,0,current_num); 
$("#minute").attr("value",current_num); 
} 
function sub_minute(){ 
var current_num=$("#minute").attr("value"); 
current_num=sub_num(0,59,current_num); 
$("#minute").attr("value",current_num); 
} 