Calculadora en javascript
Páginas: 3 (554 palabras)
Publicado: 5 de junio de 2011
Calculadora en JavaScript
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<htmlxmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Documento sin título</title>
</head>
<scriptlanguage="Javascript">
function do_it(ar)
{
ar.answer.value=eval(ar.answer.value);
if (ar.answer.value=="undefined")
{ ar.answer.value=""; }
if (ar.answer.value=="NaN" ||ar.answer.value=="Infinity")
{
ar.answer.value="";
alert("No se puede dividir un número entre 0.");
}
}
function erase(ar)
{ ar.answer.value=""; }
functionreturn_it(ar,string)
{
ar.answer.value+=string;
if (ar.answer.value=="*")
{ ar.answer.value=""; }
if (ar.answer.value=="+")
{ ar.answer.value=""; }
if (ar.answer.value=="/"){ ar.answer.value=""; }
}
var add_it='+'
var subtract_it='-'
var multiply_it='*'
var divide_it='/'
</SCRIPT>
<body>
<center>
<form name="calculator"><table border="8" cellspacing="4" cellpadding="2%" bordercolor="#000099">
<tr>
<td align="center" colspan="5" >
<b><font size="1">Calculadora</font></b></td>
</tr>
<tr>
<td align="center" colspan="5" >
<input type="text" name="answer" size="18" maxlength="20" value="" action="do(this.form)">
<inputtype="button" value="Borrar" onclick="erase(this.form)" /></td>
</tr>
<tr>
<td >
<input type="button" value=" 1 " onClick="return_it(this.form,1)">
</td><td >
<input type="button" value=" 2 " onClick="return_it(this.form,2)">
</td>
<td >
<input type="button" value=" 3 " onClick="return_it(this.form,3)">...
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<htmlxmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Documento sin título</title>
</head>
<scriptlanguage="Javascript">
function do_it(ar)
{
ar.answer.value=eval(ar.answer.value);
if (ar.answer.value=="undefined")
{ ar.answer.value=""; }
if (ar.answer.value=="NaN" ||ar.answer.value=="Infinity")
{
ar.answer.value="";
alert("No se puede dividir un número entre 0.");
}
}
function erase(ar)
{ ar.answer.value=""; }
functionreturn_it(ar,string)
{
ar.answer.value+=string;
if (ar.answer.value=="*")
{ ar.answer.value=""; }
if (ar.answer.value=="+")
{ ar.answer.value=""; }
if (ar.answer.value=="/"){ ar.answer.value=""; }
}
var add_it='+'
var subtract_it='-'
var multiply_it='*'
var divide_it='/'
</SCRIPT>
<body>
<center>
<form name="calculator"><table border="8" cellspacing="4" cellpadding="2%" bordercolor="#000099">
<tr>
<td align="center" colspan="5" >
<b><font size="1">Calculadora</font></b></td>
</tr>
<tr>
<td align="center" colspan="5" >
<input type="text" name="answer" size="18" maxlength="20" value="" action="do(this.form)">
<inputtype="button" value="Borrar" onclick="erase(this.form)" /></td>
</tr>
<tr>
<td >
<input type="button" value=" 1 " onClick="return_it(this.form,1)">
</td><td >
<input type="button" value=" 2 " onClick="return_it(this.form,2)">
</td>
<td >
<input type="button" value=" 3 " onClick="return_it(this.form,3)">...
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