JavaScript网页计算器代码，该计算器是用DW写的！
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<html<head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>计算器</title><link href="style/calculator.css" rel="stylesheet" type="text/css" /><script src="JavaScript/calculator.js"></script>></head><body ><form id="form1" name="form1" method="post" action=""> <table width="320" border="1" cellpadding="0" cellspacing="0" class="trb" id="calculator"> <tr> <td height="100" colspan="4" align="left" valign="top"><label for="txt"></label> <input name="txt" type="text" class="txt" id="txt" value="0" onfocus="this.blur();"/></td> </tr> <tr> <td width="80" height="40" align="center" valign="middle" onclick="deleteAll();">C</td> <td width="80" height="40" align="center" valign="middle" onclick="Backspace();">←</td> <td width="80" height="40" align="center" valign="middle" onclick="sign();">±</td> <td width="80" height="40" align="center" valign="middle" class="operator" onclick="add();">＋</td> </tr> <tr> <td width="80" height="40" align="center" valign="middle" onclick="command(7);">7</td> <td width="80" height="40" align="center" valign="middle" onclick="command(8);">8</td> <td width="80" height="40" align="center" valign="middle" onclick="command(9);">9</td> <td width="80" height="40" align="center" valign="middle" class="operator" onclick="subtract();">－</td> </tr> <tr> <td width="80" height="40" align="center" valign="middle" onclick="command(4);">4</td> <td width="80" height="40" align="center" valign="middle" onclick="command(5);">5</td> <td width="80" height="40" align="center" valign="middle" onclick="command(6);">6</td> <td width="80" height="40" align="center" valign="middle" class="operator" onclick="multiply();">×</td> </tr> <tr> <td width="80" height="40" align="center" valign="middle" onclick="command(1);">1</td> <td width="80" height="40" align="center" valign="middle" onclick="command(2);">2</td> <td width="80" height="40" align="center" valign="middle" onclick="command(3);">3</td> <td width="80" height="40" align="center" valign="middle" class="operator" onclick="divide();">÷</td> </tr> <tr> <td width="80" height="40" align="center" valign="middle" onclick="command(0);">0</td> <td width="80" height="40" align="center" valign="middle" onclick="dot();">▪</td> <td height="40" colspan="2" align="center" valign="middle" bgcolor="#CC6600" onclick="equal();">＝</td> </tr> </table> <p> </p> <p> </p></form></body></html>
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