function testing(button){
var x = button.value;
document.getElementById("display").innerHTML+=x;
}
function clear() {
document.getElementById("display").innerHTML = "";
}
1> gurvinder372..:
您的方法名称与id值冲突,只需将其更改为clear1,它应该有效.
function testing(button){
var x = button.value;
document.getElementById("display").innerHTML+=x;
}
function clear1(){
document.getElementById("display").innerHTML = "";
}