日期:2013-03-21  浏览次数:21166 次

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<form>
<table bgcolor="#C0C0C0" cellspacing=2 cellpadding=2 border=3>
<tr>
<td>
<b>
<h3>Parabolic Calculator</h3>
<input name="a" size="3">X<sup>2</sup>+
<input name="b" size="3">X +
<input name="c" size="3">
<br>
<input type="button" value="x-top" name="x-top" >
<input type="button" value="y-top" name="y-top" >
<input type="button" value="crd" name="crd" >
<input type="button" value="disc." name="D" >
<br>
<input type="button" value="0-points" name="zeroes" >
<input type="button" value="do all">
<input type="button" name="pics" value="show e.g." value="show e.g.">
<br>
<input type="text" name="u" size="8"> x-top<br>
<input type="text" name="u2" size="8"> y-top<br>
<input type="text" size="8" name="co" > Coord.<br>
<input type="text" size="8" name="o"> Discriminant<br>
<input type="text" size="8" name="n"> neg zero pt.<br>
<input type="text" size="8" name="n2"> pos zero pt.
<input type="hidden" value="" name="rem"><br>
<input type="reset" value="reset"><br>
</b>
</td>
<td><img src="http://www.163design.net/a/y/p1.gif" width=200 name="p" height=200 border=0 alt=""></td>
</tr>
</table>
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