<form name=mef>
<input type=hidden name=dafunction value="">
<input type=hidden name=tempnum value="">
<input type=hidden name=daboo value="">
<input type=hidden name=memob value="0">
<script language=javascript>

function numbers(x) {

var daboo= dcidcidocument.mef.daboo.value;
var dafunction = dcidcidocument.mef.dafunction.value;
var deccheck = dcidcidocument.mef.results.value;
if(dcidcidocument.mef.results.value == "0" && deccheck.indexOf('.')=="-1") {
dcidcidocument.mef.results.value = "";
}

if(daboo != "true") {
dcidcidocument.mef.results.value=dcidcidocument.mef.results.value+x;
} else {
dcidcidocument.mef.results.value=x;
dcidcidocument.mef.daboo.value="";
}

}

function add() {
  if(dcidcidocument.mef.tempnum.value){
   gofigure();
  }

dcidcidocument.mef.dafunction.value='+';
dcidcidocument.mef.daboo.value='true';
dcidcidocument.mef.tempnum.value=dcidcidocument.mef.results.value;
}

function subtract() {

  if(dcidcidocument.mef.tempnum.value){
  gofigure();
 }
dcidcidocument.mef.dafunction.value='-';
dcidcidocument.mef.daboo.value='true';
dcidcidocument.mef.tempnum.value=dcidcidocument.mef.results.value;
}

function multiply() {
 if(dcidcidocument.mef.tempnum.value){
 gofigure();
 }
dcidcidocument.mef.dafunction.value='*';
dcidcidocument.mef.daboo.value='true';
dcidcidocument.mef.tempnum.value=dcidcidocument.mef.results.value;
}
function divide() {

 if(dcidcidocument.mef.tempnum.value){
 gofigure();
 }
dcidcidocument.mef.dafunction.value='/';
dcidcidocument.mef.daboo.value='true';
dcidcidocument.mef.tempnum.value=dcidcidocument.mef.results.value;
}

function oneoverx() {
dcidcidocument.mef.results.value=1/eval(dcidcidocument.mef.results.value);
}

function percenta() {
var whatdo = dcidcidocument.mef.dafunction.value;
var percnumber = dcidcidocument.mef.results.value / 100;
if(dcidcidocument.mef.tempnum.value){
dcidcidocument.mef.results.value =  eval(dcidcidocument.mef.tempnum.value)*percnumber;
} else {
dcidcidocument.mef.results.value = "0";
}
dcidcidocument.mef.tempnum.value="";
dcidcidocument.mef.dafunction.value="";
}

function squaroot() {
dcidcidocument.mef.results.value=Math.sqrt(dcidcidocument.mef.results.value);
}
function plusminus() {
var xy = dcidcidocument.mef.results.value;
if(xy == "0"){
return false;
}
if(xy.indexOf("-") == "0") {
 xy = xy.substring(1,xy.length);
 
} else {
xy = "-" + xy;

}
dcidcidocument.mef.results.value = xy;
}
function backspace() {
//ignore if zero already.//
if(dcidcidocument.mef.results.value=="0") {
return false; }
//length of the text field//
var numlength = dcidcidocument.mef.results.value;
//subtract one.//
var newresult = numlength.length-1;
//set to new value -1;//
dcidcidocument.mef.results.value = numlength.substring(0,newresult);
//set to zero if nothing left.
if(dcidcidocument.mef.results.value=="") {dcidcidocument.mef.results.value ="0";}
}

function clearfu() {
dcidcidocument.mef.tempnum.value="";
dcidcidocument.mef.results.value="0";
dcidcidocument.mef.dafunction.value="";
}

function gofigure() {
if(dcidcidocument.mef.tempnum.value==".") {
return false;
}
var whatdo = dcidcidocument.mef.dafunction.value;
if(whatdo=="+"){ 
dcidcidocument.mef.results.value = eval(dcidcidocument.mef.results.value) + eval(dcidcidocument.mef.tempnum.value);
}
else if(whatdo=="-"){
dcidcidocument.mef.results.value =  eval(dcidcidocument.mef.tempnum.value)-eval(dcidcidocument.mef.results.value);
}
else if(whatdo=="*"){
dcidcidocument.mef.results.value = eval(dcidcidocument.mef.results.value) * eval(dcidcidocument.mef.tempnum.value);
}

else if(whatdo=="/"){
dcidcidocument.mef.results.value = eval(dcidcidocument.mef.tempnum.value)/eval(dcidcidocument.mef.results.value) ;
}

dcidcidocument.mef.tempnum.value="";
dcidcidocument.mef.dafunction.value="";
}
</script>

<script language=javascript>
<!--//
if (navigator.appName == "Netscape")  { 
dcidcidocument.write("<h3 align=center>Looks Like you're using netscape. Because Netscape is a lousy browser and doesn't do a very good job with CSS the below looks aweful. Please Use Internet Explorer and Not the buggy netscape navigotor.</h3>");
   }
//-->
</script>
<table style="border-style:inset;border-width:2px;" bgcolor=#3399ff><tr>
<td>
<p align="center"><span lang="ar-sa"><b><font face="verdana" color="#FFFFFF">آلة 
حاسبة</font></b></span></td></tr><tr>
<td><input type=text value="0" size=33 name=results></td>
</tr>
<tr><td>
<input type=text name=memry style="background-color:#cccccc;" size=2> 
<input type=button value="Backspace" style="background-color:#CCCCCC;color:red;width:67px;height:27px;font-size:10px;" OnClick="backspace()"> <input type=button value=" CE " style="background-color:#CCCCCC;color:red;width:67px;height:27px;font-size:10px;" OnClick="clearfu()"> <input type=button value=" C " style="background-color:#CCCCCC;color:red;width:57px;height:27px;font-size:10px;" OnClick="clearfu()"> 
</td></tr><tr>
<td>
<input type=button style="background-color:#CCCCCC;color:red;width:35px;height:27px;font-size:10px;" value=" MC " OnClick="dcidcidocument.mef.memry.value=' ',dcidcidocument.mef.memob.value='0'">   
<input type=button value=" 7 " style="background-color:#CCCCCC;color:blue;width:35px;height:27px;font-size:10px;" OnClick="numbers(7)"> <input type=button value=" 8 " style="background-color:#CCCCCC;color:blue;width:35px;height:27px;font-size:10px;" OnClick="numbers(8)"> <input type=button value=" 9 " style="background-color:#CCCCCC;color:blue;width:35px;height:27px;font-size:10px;" OnClick="numbers(9)"> 

<input type=button style="background-color:#CCCCCC;color:red;width:35px;height:27px;font-size:10px;" value=" / " OnClick="divide()">
<input type=button style="background-color:#CCCCCC;color:blue;width:35px;height:27px;font-size:10px;" value="sqrt" OnClick="squaroot()">
</td></tr><tr>
<td>
<input type=button style="background-color:#CCCCCC;color:red;width:35px;height:27px;font-size:10px;" value="MR" OnClick="dcidcidocument.mef.results.value=dcidcidocument.mef.memob.value">   
<input type=button value=" 4 " style="background-color:#CCCCCC;color:blue;width:35px;height:27px;font-size:10px;" OnClick="numbers(4)"> <input type=button value=" 5 " style="background-color:#CCCCCC;color:blue;width:35px;height:27px;font-size:10px;" OnClick="numbers(5)"> <input type=button value=" 6 " style="background-color:#CCCCCC;color:blue;width:35px;height:27px;font-size:10px;" OnClick="numbers(6)"> 

<input type=button style="background-color:#CCCCCC;color:red;width:35px;height:27px;font-size:10px;" value=" * " OnClick="multiply()">
<input type=button style="background-color:#CCCCCC;color:blue;width:35px;height:27px;font-size:10px;" value=" % " OnClick="percenta()">
</td></tr>
<tr>
<td>
<input type=button style="background-color:#CCCCCC;color:red;width:35px;height:27px;font-size:10px;" value=" MS ">   
<input type=button value=" 1 " style="background-color:#CCCCCC;color:blue;width:35px;height:27px;font-size:10px;" OnClick="numbers(1)"> <input type=button value=" 2 " style="background-color:#CCCCCC;color:blue;width:35px;height:27px;font-size:10px;" OnClick="numbers(2)"> <input type=button value=" 3 " style="background-color:#CCCCCC;color:blue;width:35px;height:27px;font-size:10px;" OnClick="numbers(3)"> 

<input type=button style="background-color:#CCCCCC;color:red;width:35px;height:27px;font-size:10px;" value=" - " OnClick="subtract()">
<input type=button style="background-color:#CCCCCC;color:blue;width:35px;height:27px;font-size:10px;" value=" 1/x " OnClick="oneoverx()">
</td>
</tr><tr>
<td>
<input type=button style="background-color:#CCCCCC;color:red;width:35px;height:27px;font-size:10px;" value=" M+ " OnClick="dcidcidocument.mef.memry.value=' M',dcidcidocument.mef.memob.value=dcidcidocument.mef.results.value;">   
<input type=button value="0" style="background-color:#CCCCCC;color:blue;width:35px;height:27px;font-size:10px;" OnClick="numbers(0)"> <input type=button value="+/-" style="background-color:#CCCCCC;color:blue;width:35px;height:27px;font-size:10px;" OnClick="plusminus() "> <input type=button value=" . " style="background-color:#CCCCCC;color:blue;width:35px;height:27px;font-size:10px;" OnClick="numbers('.')"> <input type=button style="background-color:#CCCCCC;color:red;width:35px;height:27px;font-size:10px;" value=" + " OnClick="add()"> <input type=button style="background-color:#CCCCCC;color:blue;width:35px;height:27px;font-size:10px;" value=" = " OnClick="gofigure()">
</td></tr>
<tr><td> </td></tr>
</table>

<table style="border-style:inset;border-width:2px;" bgcolor=#3399ff><tr>