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sccalc.html
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<!DOCTYPE html>
<html lang="en">
<head>
<script type="text/javascript"></script>
<script src="../JavaScript%20Files/sccalc.js" type="text/javascript"></script>
<link rel="stylesheet" href="../CSS%20Files/sccalc.css">
<title>Calculator</title>
</head>
<form name="sci-calc">
<table class="calculator" cellspacing="0" cellpadding="1">
<tr>
<td colspan="5"><label id="label" for="display">SCIENTIFIC CALCULATOR</label><input id="display" name="display" value="0" size="28" maxlength="25"></td>
</tr>
<tr>
<td><input type="button" class="btnTop" name="btnTop" value="C" onclick="this.form.display.value= 0 "></td>
<td><input type="button" class="btnTop" name="btnTop" value="<--" onclick="deleteChar(this.form.display)">
</td>
<td><input type="button" class="btnTop" name="btnTop" value="="
onclick="if(checkNum(this.form.display.value)) { compute(this.form) }"></td>
<td><input type="button" class="btnOpps" name="btnOpps" value="π"
onclick="addChar(this.form.display,'3.14159265359')"></td>
<td><input type="button" class="btnMath" name="btnMath" value="%" onclick=" percent(this.form.display)">
</td>
</tr>
<tr>
<td><input type="button" class="btnNum" name="btnNum" value="7" onclick="addChar(this.form.display, '7')">
</td>
<td><input type="button" class="btnNum" name="btnNum" value="8" onclick="addChar(this.form.display, '8')">
</td>
<td><input type="button" class="btnNum" name="btnNum" value="9" onclick="addChar(this.form.display, '9')">
</td>
<td><input type="button" class="btnOpps" name="btnOpps" value="x^"
onclick="if(checkNum(this.form.display.value)) { exp(this.form) }"></td>
<td><input type="button" class="btnMath" name="btnMath" value="/" onclick="addChar(this.form.display, '/')">
</td>
<tr>
<td><input type="button" class="btnNum" name="btnNum" value="4" onclick="addChar(this.form.display, '4')">
</td>
<td><input type="button" class="btnNum" name="btnNum" value="5" onclick="addChar(this.form.display, '5')">
</td>
<td><input type="button" class="btnNum" name="btnNum" value="6" onclick="addChar(this.form.display, '6')">
</td>
<td><input type="button" class="btnOpps" name="btnOpps" value="ln"
onclick="if(checkNum(this.form.display.value)) { ln(this.form) }"></td>
<td><input type="button" class="btnMath" name="btnMath" value="*" onclick="addChar(this.form.display, '*')">
</td>
</tr>
<tr>
<td><input type="button" class="btnNum" name="btnNum" value="1" onclick="addChar(this.form.display, '1')">
</td>
<td><input type="button" class="btnNum" name="btnNum" value="2" onclick="addChar(this.form.display, '2')">
</td>
<td><input type="button" class="btnNum" name="btnNum" value="3" onclick="addChar(this.form.display, '3')">
</td>
<td><input type="button" class="btnOpps" name="btnOpps" value="√"
onclick="if(checkNum(this.form.display.value)) { sqrt(this.form) }"></td>
<td><input type="button" class="btnMath" name="btnMath" value="-" onclick="addChar(this.form.display, '-')">
</td>
</tr>
<tr>
<td><input type="button" class="btnMath" name="btnMath" value="±"
onclick="changeSign(this.form.display)"></td>
<td><input type="button" class="btnNum" name="btnNum" value="0" onclick="addChar(this.form.display, '0')">
</td>
<td><input type="button" class="btnMath" name="btnMath" value="."
onclick="addChar(this.form.display, '.')"></td>
<td><input type="button" class="btnOpps" name="btnOpps" value="x2"
onclick="if(checkNum(this.form.display.value)) { square(this.form) }"></td>
<td><input type="button" class="btnMath" name="btnMath" value="+" onclick="addChar(this.form.display, '+')">
</td>
</tr>
<tr>
<td><input type="button" class="btnMath" name="btnMath" value="(" onclick="addChar(this.form.display, '(')">
</td>
<td><input type="button" class="btnMath" name="btnMath" value=")" onclick="addChar(this.form.display,')')">
</td>
<td><input type="button" class="btnMath" name="btnMath" value="cos"
onclick="if(checkNum(this.form.display.value)) { cos(this.form) }"></td>
<td><input type="button" class="btnMath" name="btnMath" value="sin"
onclick="if(checkNum(this.form.display.value)) { sin(this.form) }"></td>
<td><input type="button" class="btnMath" name="btnMath" value="tan"
onclick="if(checkNum(this.form.display.value)) { tan(this.form) }"></td>
</tr>
</table>
</form>
</html>