calculadora
Publicado por felipe (1 intervención) el 30/10/2007 20:25:50
hola alguien me puede decir como hacer una calculadora en visual basic srcipt en HTML
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<script language="javascript">
var inputstring=" "
function updatestring(value)
{inputstring += value;
document.calculator.input.value=inputstring;
}</script>
<center>
<table border=5 bordercolor=gray cellspacing=8>
<form name="calculator">
<th>
THE CALCULATOR
</th>
<tr align="center">
<td>
<input type="text" name="input" maxlength=10 size=24>
</td></tr>
<tr align="center"><td>
<input type="button" value=" + " onclick="updatestring('+')">
<input type="button" value=" - " onclick="updatestring('-')">
<input type="button" value=" / " onclick="updatestring('/')">
<input type="button" value=" * " onclick="updatestring('*')">
</td></tr><tr align=center><td>
<input type="button" value=" mod " onclick="updatestring('%')">
<input type="button" value=" 0 " onclick="updatestring('0')">
<input type="button" value=" 1 " onclick="updatestring('1')">
<input type="button" value=" 2 " onclick="updatestring('2')">
</td</tr><tr align=center><td>
<input type="button" value=" 3 " onclick="updatestring('3')">
<input type="button" value=" 4 " onclick="updatestring('4')">
<input type="button" value=" 5 " onclick="updatestring('5')">
<input type="button" value=" 6 " onclick="updatestring('6')">
</td></tr><tr align="center"><td>
<input type="button" value=" 7 " onclick="updatestring('7')">
<input type="button" value=" 8 " onclick="updatestring('8')">
<input type="button" value=" 9 " onclick="updatestring('9')">
</td></tr>
<tr align="center"><td>
<input type="button" value=" clear " onclick="input.value=' ';inputstring=' ' ">
<input type="button" value=" = " onclick="input.value=eval(inputstring);">
</td>
</tr>
</form>
</table>
</center>
<HTML>
<HEAD>
<!-- Código descargado gratuitamente de HTMLpoint, el sitio italiano del web publishing
http://www.htmlpoint.com --><TITLE>Demo Dynamic HTML: ejemplo práctico </TITLE>
</HEAD>
<BODY bgcolor="white" >
<CENTER>
<table border="2" width="200" cellspacing="0" cellpadding="0" bgcolor="#000000"
style="border-color:black" onClick="previouskey=event.srcElement.innerText">
<tr>
<td width="100%" bgcolor="#FFFFFF" id="result"
style="font:bold 20px Verdana;color:black;text-align='right'">0</td>
</tr>
<tr>
<td width="100%" valign="middle" align="center"><table border="0" width="100%"
cellspacing="0" cellpadding="0" style="font:bold 20px Verdana;color:white">
<tr>
<td width="80%" align="center"><table border="1" width="100%" cellspacing="0"
cellpadding="0" style="cursor:hand;font:bold 20px Verdana;color:white"
onMouseover="if (event.srcElement.tagName=='TD')event.srcElement.style.color='yellow'"
onMouseout="event.srcElement.style.color='white'" onselectStart="return false"
onClick="calculate()" height="82">
<tr>
<td width="25%" align="center" height="17">7</td>
<td width="25%" align="center" height="17">8</td>
<td width="25%" align="center" height="17">9</td>
<td width="25%" align="center" height="17">/</td>
</tr>
<tr>
<td width="25%" align="center" height="19">4</td>
<td width="25%" align="center" height="19">5</td>
<td width="25%" align="center" height="19">6</td>
<td width="25%" align="center" height="19">*</td>
</tr>
<tr>
<td width="25%" align="center" height="19">1</td>
<td width="25%" align="center" height="19">2</td>
<td width="25%" align="center" height="19">3</td>
<td width="25%" align="center" height="19">-</td>
</tr>
<tr>
<td width="25%" align="center" height="19">0</td>
<td width="25%" align="center" height="19"
onClick="pn();previouskey=1;event.cancelBubble=true">+/-</td>
<td width="25%" align="center" height="19">.</td>
<td width="25%" align="center" height="19">+</td>
</tr>
</table>
</td>
<td width="20%"><div align="left"><table border="1" width="100%" cellspacing="0"
cellpadding="0">
<tr>
<td width="100%" style="cursor:hand;font:bold 20px Verdana;color:white;text-align:center"
onClick="result.innerText=0;results=''">C</td>
</tr>
</table>
</div><div align="left"><table border="1" width="100%" cellspacing="0" cellpadding="0"
height="81">
<tr>
<td width="100%" style="cursor:hand;font:bold 32px Verdana;color:white;text-align:center"
onMouseover="event.srcElement.style.color='yellow'"
onMouseout="event.srcElement.style.color='white'" onClick="calculateresult()">=</td>
</tr>
</table>
</div></td>
</tr>
</table>
</td>
</tr>
</table>
<script language="JavaScript1.2">
var results=''
var previouskey=''
var re=/(/|*|+|-)/
var re2=/(/|*|+|-){2}$/
var re3=/.+(/|*|+|-).+/
var re4=/d|./
var re5=/^[^/*+].+d$/
var re6=/./
function calculate(){
if (event.srcElement.tagName=="TD"){
if (event.srcElement.innerText.match(re4)&&previouskey=="=")
results=''
if (result.innerText.match(re3)&&event.srcElement.innerText.match(re)){
if (!results.match(re5)){
result.innerText="Error!"
return
}
results=eval(results)
if (results.toString().length>=12&&results.toString().match(re6))
results=results.toString().substring(0,12)
result.innerText=results
}
results+=event.srcElement.innerText
if (results.match(re2))
results=results.substring(0,results.length-2)+results.charAt(results.length-1)
result.innerText=results
}
}
function calculateresult(){
if (!results.match(re5)){
result.innerText="Error!"
return
}
results=eval(results)
if (results.toString().length>=12&&results.toString().match(re6))
results=results.toString().substring(0,12)
result.innerText=results
}
function pn(){
if (result.innerText.charAt(0)!='-')
result.innerText=results='-'+result.innerText
else if (result.innerText.charAt(0)=='-')
result.innerText=results=result.innerText*(-1)
}
</script>
</CENTER>
</body>
</html>