经典计算器

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经典计算器

作者:经典计算器发布时间:2007-11-21 23:41:16 发布人: admin

<html>
<head>
<title>中国建站之家网页特效演示，经典计算器</title>
</head><body>

<center>
<table border="0" cellspacing="0" cellpadding="0" width="239">
<tr>
<td width="239" valign="top"><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()">=<script language="JavaScript1.2">
/*
DHTML Calculator Script-
?Dynamic Drive (www.dynamicdrive.com)
For full source code, installation instructions,
100's more DHTML scripts, and Terms Of
Use, visit dynamicdrive.com
*/
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>
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