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Calculadora
Código HTML necessário:
<![CDATA[
<CENTER>
<FORM NAME="Calc"><TABLE BORDER=4><TR><TD>
<INPUT TYPE="text" NAME="Input" SIZE="16"><BR></TD></TR><TR><TD>
<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="plus"
VALUE=" + " onClick="Calc.Input.value += ' + '"><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="minus"
VALUE=" - " onClick="Calc.Input.value += ' - '"><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="times"
VALUE=" x " onClick="Calc.Input.value += ' * '"><BR>
<INPUT TYPE="button" NAME="clear"VALUE=" c " onClick="Calc.Input.value = ''">
<INPUT TYPE="button" NAME="zero"VALUE=" 0 " onClick="Calc.Input.value += '0'">
<INPUT TYPE="button" NAME="DoIt"
VALUE=" = " onClick="Calc.Input.value = eval(Calc.Input.value)">
<INPUT TYPE="button" NAME="div"
VALUE=" / " onClick="Calc.Input.value += ' / '"><BR></TD></TR></TABLE>
</FORM>
</CENTER>
]]>
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