<table></table>
<style>
input {
border-color: #7f827f;s
border: none;
width: 80px;
font-size: 14px;
padding: 2px;
}
input:hover {
background-color: #eee;
}
input:focus {
background-color: #ccf;
}
input:not(:focus) {
text-align: right;
}
table {
border-collapse: collapse;
}
td {
border: 1px solid #999;
padding: 0;
}
tr:first-child td, td:first-child {
background-color: #ccc;
padding: 1px 3px;
font-weight: bold;
text-align: center;
}
</style>
<script>
for (var i=0; i<50; i++) {
var row = document.querySelector("table").insertRow(-1);
for (var j=0; j<20; j++) {
var letter = String.fromCharCode("A".charCodeAt(0)+j-1);
row.insertCell(-1).innerHTML = i&&j ? "<input id='"+ letter+i +"'/>" : i||letter;
}
}
var DATA={}, INPUTS=[].slice.call(document.querySelectorAll("input"));
INPUTS.forEach(function(elm) {
elm.onfocus = function(e) {
e.target.value = localStorage[e.target.id] || "";
};
elm.onblur = function(e) {
localStorage[e.target.id] = e.target.value;
computeAll();
};
var getter = function() {
var value = localStorage[elm.id] || "";
if (value.charAt(0) == "=") {
with (DATA) return eval(value.substring(1));
} else { return isNaN(parseFloat(value)) ? value : parseFloat(value); }
};
Object.defineProperty(DATA, elm.id, {get:getter});
Object.defineProperty(DATA, elm.id.toLowerCase(), {get:getter});
});
(window.computeAll = function() {
INPUTS.forEach(function(elm) { try { elm.value = DATA[elm.id]; } catch(e) {} });
})
(window.computeAll = function() {
INPUTS.forEach(function(elm) { try { elm.value = DATA[elm.id]/DATA[elm.id]; } catch(e) {} });
})
(window.computeAll = function() {
INPUTS.forEach(function(elm) { try { elm.value = DATA[elm.id]*DATA[elm.id]; } catch(e) {} });
})
(window.computeAll = function() {
INPUTS.forEach(function(elm) { try { elm.value = DATA[elm.id]+DATA[elm.id]; } catch(e) {} });
})
(window.computeAll = function() {
INPUTS.forEach(function(elm) { try { elm.value = DATA[elm.id]-DATA[elm.id]; } catch(e) {} });
})
();
</script>
Простой
