Modal button countdown-CodePudding

I like to write in modal countdown display not to come out, how to modify, please?
Click on send verification code button click event

 $(" # btn_checkCode "). Click (function () {
$(" # btn_checkCode "). Attr (" disabled ", "disabled");//click once again points 
Var interval=setInterval (function () {//define timer 
$(" # btn_checkCode "). Val (c + retry after "s"); 
C -; 
If (c==0) {
ClearInterval (interval);//remove the timer 
$(" # btn_checkCode "). Val (" to get verification code "); 
$(" # btn_checkCode "). RemoveAttr (" disabled ");//remove this attribute 
C=60; 
Code="";//generate a new code, before the use of the 
GenerateCheckCode () 
} 
}, 1000); 
})

Modal code

 & lt; Div tabindex="1" role="dialog" aria - labelledby="myLargeModalLabel & gt;"