Хан,
<!DOCTYPE html>
<html>
<head>
<title>JavaScript</title>
<meta charset="utf-8" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script type="text/javascript">
function proverka(input) {
var value = input.value;
var rep = /[;":'a-zA-Zа-яА-Я]/;
if (rep.test(value)) {
value = value.replace(rep, '');
input.value = value;
}
}
function persent(input) {
var x = input.value.split("*");
var y = x[0];
x = x[1];
var s = x * y / 100;
input.value = s
};
function timer() {
var s = Number(document.getElementById("timer").innerHTML);
s++;
document.getElementById("timer").innerHTML = s;
setTimeout("timer()", 1000);
}
function date() {
var date = new Date();
var text = date.getFullYear();
text += ".0" + Number(date.getMonth()+1);
text += ".1" + date.getDay();
text += "." + date.getHours();
text += "." + date.getMinutes();
text += "." + date.getSeconds();
document.getElementById("niggus").innerHTML = text;
}
</script>
<style>
#calc * {font-size: 16px;}
#calc table {border: solid 3px silver; border-spacing: 3px; background-color: #EEE; width: 319px;}
#calc table td {border-spacing: 3px;}
input.display {width: 300px; text-align: left; outline: none; color: #000; padding-left: 2px;}
input[type= button] {width: 40px; height: 30px; background-color: #EEE; outline: none;}
input.doit {width: 304px; background-color: #6A5ACD;}
input.dim{background-color: #A9A9A9;}
input.gray{background-color: #C0C0C0;}
input.silver{background-color: #d3d3d3;}
input.blue{background-color: #d3d3d3;}
.pp{margin-top: -15px; font-size: 22px; font-weight: bold; color: #00FF00;}
.p{font-size: 17px; font-weight: bold; color: #00FF00;}
#timer{font-size: 80px; color: #FF1493; position: relative;}
#sekundomer {background-color: #000; width: 176px; height: 124px; border: 3px solid silver; text-align: center; margin-left: 419px; margin-top: -198px;}
#date_nigga {margin-left: 720px; margin-top: -130px;}
</style>
</head>
<body onload="timer(this), date(this)">
<form name="calculator" id="calc">
<table>
<tr>
<td>
<input type="text" name="input" size="16" class="display" disabled placeholder="0" onkeyup="return proverka(this)" onsubmit="Checkform(this)" />
</td>
</tr>
<tr>
<td class="buttons">
<input type="button" name="skobka" value="(" class="gray" Onclick="calc.input.value += '('"/>
<input type="button" name="skobka" value=")" class="gray" Onclick="calc.input.value += ')'"/>
<input type="button" name="percent" value="%" class="gray" Onclick="persent(calc.input)">
<input type="button" name="clear" value="C" class="gray" OnClick="calc.input.value = ''"/>
<input type="button" name="clear_one" value="CE" class="gray" Onclick="calc.input.value = input.value.substring(0, input.value.length - 1)"/>
<input type="button" name="sq" value="sq" class="dim" Onclick="" />
<input type="button" name="asin" value="as" class="dim" Onclick="" />
<br/>
<input type="button" name="one" value="1" OnClick="calc.input.value += '1'"/>
<input type="button" name="two" value="2" OnClick="calc.input.value += '2'"/>
<input type="button" name="three" value="3" OnClick="calc.input.value += '3'"/>
<input type="button" name="add" value="+" class="silver" OnClick="calc.input.value += '+'"/>
<input type="button" name="sub" value="-" class="silver" OnClick="calc.input.value += '-'"/>
<input type="button" name="exp" value="exp" class="dim" Onclick="">
<input type="button" name="sqrt" value="sqr" class="dim" Onclick="">
<br>
<input type="button" name="four" value="4" OnClick="calc.input.value += '4'">
<input type="button" name="five" value="5" OnClick="calc.input.value += '5'">
<input type="button" name="six" value="6" OnClick="calc.input.value += '6'">
<input type="button" name="mul" value="x" class="silver" OnClick="calc.input.value += '*'"/>
<input type="button" name="div" value="/" class="silver" OnClick="addChar(calc.input.value += '/')">
<input type="button" name="sin" value="sin" class="dim" Onclick="">
<input type="button" name="cos" value="cos" class="dim" Onclick="if (checkNum(this.calc.value)) { cos(this.calc) }">
<br>
<input type="button" name="seven" value="7" OnClick="calc.input.value += '7'">
<input type="button" name="eight" value="8" OnClick="calc.input.value += '8'">
<input type="button" name="nine" value="9" OnClick="calc.input.value += '9'">
<input type="button" name="zero" value="0" OnClick="calc.input.value += '0'"/>
<input type="button" name="tochka" value="." class="blue" Onclick="calc.input.value += '.'"/>
<input type="button" name="tan" value="tan" class="dim" Onclick="">
<input type="button" name="In" value="In" class="dim" Onclick="">
</td>
</tr>
<tr>
<td>
<input type="button" name="doit" value="=" class="doit" OnClick="calc.input.value = eval(calc.input.value)"/>
</td>
</tr>
</table>
</form>
<div id="sekundomer">
<br/>
<span id="timer">-1</span>
<br/>
</div>
<div id="date_nigga">
<p>Вы зашли на сайт:</p>
<p id="niggus" ></p>
<p>Год.Месяц.День.Час.Минута.Секунда</p>
</div>
</body>
</html>