function fixed(s,n){
var str = s + " ";var pat = /e/i;var res = str.match(pat);
if (res == "e" || res == "E") {return s;}
s = 1 * s;var s_ori = s;var flag = 0;
if (s < 0){s = -1 * s;flag = 1;}
var val = Math.pow(0.1,n);
if (s < 10 * val) {return s_ori;}
if (str.length > (n+1)){s = s.toFixed(n);s = s.replace(/0+$/,"");s = s.replace(/\.$/,"");}  
if (flag == 1) {s = -1 * s;}return s;}
function  lfixsci(s,n)
{  
var tp=s;var tpStr=new String(tp);  
if ((tpStr.indexOf('E') != -1) || (tpStr.indexOf('e') != -1)){  
var regExp=/^(\d+.\d+)[Ee]([\+\-]?\d+)$/;  
var result=regExp.exec(tp);var num="";var power="";  
if (result!=null){  
num=result[1];power=result[2];var res=fixed(num,n);
if (res==10){res=1;power=1 * power + 1;power="+" +power;}
res += "e";res += power;return res;}  
else{return s;}} 
else{return s;}} 
function lfixed(s,n){
var str=s+" ";var pat=/e/i;var res=str.match(pat);
if (res=="e" || res=="E"){s=lfixsci(s,n);return s;}
s=1 * s;var s_ori=s;var flag=0;
if (s<0){s= -1 * s;flag=1;}
if (str.length>(n+1)){s=s.toFixed(n);s=s.replace(/0+$/,"");s=s.replace(/\.$/,"");}  
if (flag==1) {s= -1 * s;}return s;}
function lfix(s){
var s_ori = s;
if (s < 0) s = -1 * s;
var tpStr=new String(s);  
if  ((tpStr.indexOf('E') != -1) || (tpStr.indexOf('e') != -1)){s = lfixsci(s,6);return s;}
s = 1 * s;
if (s>100000000){s = s.toExponential(8);s = lfixsci(s,6);return s;}
if (s>0.1) {s=lfixed(s,6);}
else if (s>0.01) {s=lfixed(s,8);}
else if (s<0.01 && s>0.0001) {s=lfixed(s,10);}
else if (s<0.0001 && s>0.000001) {s=lfixed(s,12);}
else if (s<0.000001 && s>0.00000001) {s=lfixed(s,14);}
else if (s<0.00000001 && s>0.0000000001) {s=lfixed(s,16);}
else if (s<0.0000000001 && s>0.000000000001) {s=lfixed(s,18);}
else if (s<0.000000000001 && s>0.00000000000001) {s=lfixed(s,20);}
else if (s<0.00000000000001 && s>0.0000000000000001) {s=lfixed(s,22);}
else if (s<0.0000000000000001 && s>0.000000000000000001) {s=lfixed(s,24);}
else if (s<0.000000000000000001 && s>0.00000000000000000001) {s=lfixed(s,26);}
else if (s<0.00000000000000000001 && s>0.0000000000000000000001) {s=lfixed(s,28);}
else if (s<0.0000000000000000000001 && s>0.000000000000000000000001) {s=lfixed(s,30);}
if (s_ori < 0) s = -1 * s;
return s;}
function afocus(a){}

var sg1 = new Array();
var sg2 = new Array();
var curr = 0;
var un = 0;
var re = 0;
sg1[curr] = "";
sg2[curr] = "";

function csclear()
{
     document.cs.a.value = '';
     document.cs.b.value = '';
   
   var ss = document.getElementById('output');
     ss.innerHTML = '';  
   
     document.cs.a.focus();
}

function csclear2()
{
     document.cs.a.value = '';
     document.cs.b.value = '';
    $('#output').text('结果描述');
     document.cs.a.focus();
}

function csclear3()
{
     document.cs2.g1.value = '';
     document.cs2.g2.value = '';
     document.cs2.g1.focus();
}

function isNum(args)
{
  args = args.toString();

  if (args.length == 0)
  return false;

  for (var i = 0;  i<args.length;  i++)
  {
    if ((args.substring(i,i+1) < "0" || args.substring(i, i+1) > "9") && args.substring(i, i+1) !="."&& args.substring(i, i+1) != "-")
    {
      return false;
    }
  }

  return true;
}
function cscheck(i)
{
    var a = document.cs.a.value;
  if (i == "1" && !isNum(a))
  {
      a = a.substring(0,a.length-1);
      document.cs.a.value = a;
      return;    
  }
}
    
function calcs2()
{
     var g1 = document.cs2.g1.value;
   var arr1 = new Array;
   var res="";
   
   if (g1 == "") return;
   
  if (g1.indexOf("\r\n") != -1){arr1 = g1.split("\r\n");}
  else if (g1.indexOf("\n") != -1){arr1 = g1.split("\n");}
  else if (g1.indexOf(",") != -1){arr1 = g1.split(",");}
  else if (g1.indexOf("\t") != -1){arr1 = g1.split("\t");}
  else{arr1 = g1.split(" ");}
  
  for (var ii=0; ii<arr1.length; ii++)
  {
     var tp2 = Math.abs(arr1[ii]);
     tp2 = lfix(tp2);
     res += tp2 + "\r\n";
  } 
  document.cs2.g2.value = res;
   
  curr = curr + 1;
  sg1[curr] = g1;
  sg2[curr] = res;
  un = curr;
    document.cs2.undo2.disabled = false;
   return;
}

function undo()
{
   un = un -1;
   if (un <= 0)
   {
      un = 0;
    document.cs2.undo2.disabled = true;
    
   }
   
   re = un;
   document.cs2.redo2.disabled = false;
   
   document.cs2.g1.value = sg1[un];
   document.cs2.g2.value = sg2[un];
}

function redo()
{
   re = re + 1;
   if (re >= sg1.length-1)
   {
      re = sg1.length-1;
    document.cs2.redo2.disabled = true;
   }
   
   un = re;
   document.cs2.undo2.disabled = false;
   
   document.cs2.g1.value = sg1[un];
   document.cs2.g2.value = sg2[un];
}
function calcs()
{
  var a = document.cs.a.value;
  
   if (a == "") {return;}
   a = 1 * a;
   

  b = Math.abs(a);
  
  b = lfix(b);
  
  document.cs.b.value = b;
   
  var ss = $('#output');
  ss.text('');
  str = "数字 "+ a + " 的绝对值是：" + b +  "";
  ss.text(str);
}