之前发布了一款简易的计算器，今天做了一下修改，添加了键盘监听事件，不用再用鼠标点点点啦
JS代码：
47 && event.keyCode < 58)
|| (event.keyCode > 95 && event.keyCode < 106) || (event.keyCode == 190 || event.keyCode == 110))
&& !event.shiftKey) {
keyDownNum(event.keyCode);
}
// "+"监听
if ((event.keyCode == 187 && event.shiftKey)
|| event.keyCode == 107) {
keyDownYuSuan(1);
}
// "-"监听
if ((event.keyCode == 189 && event.shiftKey)
|| event.keyCode == 109) {
keyDownYuSuan(2);
}
// "*"监听
if ((event.keyCode == 56 && event.shiftKey)
|| event.keyCode == 106) {
keyDownYuSuan(3);
}
// "/"监听
if (event.keyCode == 191 || event.keyCode == 111) {
keyDownYuSuan(4);
}
// "="监听
if ((event.keyCode == 187 && !event.shiftKey)
|| event.keyCode == 13) {
$("#dengYu").click();
}
// "回退"监听
if (event.keyCode == 8) {
$("#tuiGe").click();
return false;
}
// "清屏"监听
if (event.keyCode == 27 || event.keyCode == 46
|| (event.keyCode == 110 && event.shiftKey)) {
$("#qingPing").click();
return false;
}
// "存储"监听
if (event.keyCode == 112) {
$("#cunChu").click();
return false;
}
// "取存"监听
if (event.keyCode == 113) {
$("#quCun").click();
return false;
}
// "累存"监听
if (event.keyCode == 114) {
$("#leiCun").click();
return false;
}
// "积存"监听
if (event.keyCode == 115) {
$("#jiCun").click();
return false;
}
// "清存"监听
if (event.keyCode == 117) {
$("#qingCun").click();
return false;
}
});
/**
* 按键触发运算符 value 1-'+' 2-'-' 3-'*' 4-'/'
*/
function keyDownYuSuan(value) {
change = 1;
yuSuan = value;
var value = $("#jieguo").html();
var dianIndex = value.indexOf(".");
if (dianIndex == value.length) {
value = value.substr(0,value.length - 1);
}
num1 = parseFloat(value);
}
/**
* 按键触发数字 code ASCLL码
*/
function keyDownNum(code) {
var number = 0;
if (code == 48 || code == 96) {// "0"监听
number = 0;
}
if (code == 49 || code == 97) {// "1"监听
number = 1;
}
if (code == 50 || code == 98) {// "2"监听
number = 2;
}
if (code == 51 || code == 99) {// "3"监听
number = 3;
}
if (code == 52 || code == 100) {// "4"监听
number = 4;
}
if (code == 53 || code == 101) {// "5"监听
number = 5;
}
if (code == 54 || code == 102) {// "6"监听
number = 6;
}
if (code == 55 || code == 103) {// "7"监听
number = 7;
}
if (code == 56 || code == 104) {// "8"监听
number = 8;
}
if (code == 57 || code == 105) {// "9"监听
number = 9;
}
if (code == 190 || code == 110) {// "."监听
number = ".";
}
var num = number;
var oldValue = $("#jieguo").html();
if (change == 1) {
oldValue = "0";
change = 0;
}
var newValue = "";
if (num == -1) {
oldValue = parseFloat(oldValue);
newValue = oldValue * -1;
} else if (num == ".") {
if (oldValue.indexOf('.') == -1)
newValue = oldValue + ".";
else
newValue = oldValue;
} else {
if (oldValue == 0 && oldValue.indexOf('.') == -1) {
newValue = num;
} else {
newValue = oldValue + num;
}
}
$("#jieguo").html(newValue);
}