function show(){
 document.getElementById("menu2").style.display='block';
 return false;
}

function hide(){
 document.getElementById("menu2").style.display='none';
 return false;
}

function show1(){
 document.getElementById("journalz").style.display='inline';
 return false;
}

function hide1(){
 document.getElementById("journalz").style.display='none';
 return false;
}


function calculate(){
  var proizv1 = document.getElementById('proizv').value;
  var pron    = document.getElementById('pressure_on').value;
  var proff   = document.getElementById('pressure_off').value;

  var am, preresult, preresult1, preresult2, mark;

  am = Math.round(16.5*(proizv1*1000/60/11));

  preresult1 = ((proizv1/44)*1.3/(1-(pron/proff)))*1000;
  preresult2 = Math.round(preresult1);
  if (preresult2 < 9) preresult=8; 
  if (preresult2<13 && preresult2>8) preresult=12;
  if (preresult2<19 && preresult2>12) preresult=18;
  if (preresult2<25 && preresult2>18) preresult=24;
  if (preresult2<36 && preresult2>24) preresult=35;
  if (preresult2<51 && preresult2>35) preresult=50;
  if (preresult2<81 && preresult2>50) preresult=80;
  if (preresult2<101 && preresult2>80) preresult=100;
  if (preresult2<151 && preresult2>100) preresult=150;
  if (preresult2<201 && preresult2>150) preresult=200;
  if (preresult2<301 && preresult2>200) preresult=300;
  if (preresult2<501 && preresult2>300) preresult=500;

  if(preresult2>500) {preresult='Такого оборудования нет'; mark='';}
  else{
    if(preresult==8 || preresult==12 || preresult==18 || preresult==35 || preresult==150 || preresult==200 || preresult==300 || preresult==500)
      mark='WAV';
    else{
      if(preresult<501) mark='WAV/WAO';
    }
  }
//  alert(mark);

  document.getElementById('water_amount').value = am;
  document.getElementById('mark').innerHTML = mark;
  document.getElementById('result').innerHTML = preresult;
  return false;
}


function calculate1(){
  var power = document.getElementById('power').value;
  var preresult0, preresult,preresult1,preresult2;

  preresult1 = Math.round(((0.034*15*power)/(1-(1/3)))/0.5);
  preresult2 = Math.round(((0.0517*15*power)/(1-1/3))/0.5);

  if (preresult1 < 9) preresult0=8; 
  if (preresult1<13 && preresult1>8) preresult0=12;
  if (preresult1<19 && preresult1>12) preresult0=18;
  if (preresult1<25 && preresult1>18) preresult0=24;
  if (preresult1<36 && preresult1>24) preresult0=35;
  if (preresult1<51 && preresult1>35) preresult0=50;
  if (preresult1<81 && preresult1>50) preresult0=80;
  if (preresult1<101 && preresult1>80) preresult0=100;
  if (preresult1<151 && preresult1>100) preresult0=150;
  if (preresult1<201 && preresult1>150) preresult0=200;
  if (preresult1<301 && preresult1>200) preresult0=300;
  if (preresult1<501 && preresult1>300) preresult0=500;
  if (preresult1>500) {preresult='Такого оборудования нет';}


  if (preresult2 < 9) preresult=8; 
  if (preresult2<13 && preresult2>8) preresult=12;
  if (preresult2<19 && preresult2>12) preresult=18;
  if (preresult2<25 && preresult2>18) preresult=24;
  if (preresult2<36 && preresult2>24) preresult=35;
  if (preresult2<51 && preresult2>35) preresult=50;
  if (preresult2<81 && preresult2>50) preresult=80;
  if (preresult2<101 && preresult2>80) preresult=100;
  if (preresult2<151 && preresult2>100) preresult=150;
  if (preresult2<201 && preresult2>150) preresult=200;
  if (preresult2<301 && preresult2>200) preresult=300;
  if (preresult2<501 && preresult2>300) preresult=500;
  if(preresult2>500) {preresult='Такого оборудования нет';}

  document.getElementById('teplowater').innerHTML = "VRV " + preresult0;
  document.getElementById('teploetilen').innerHTML = "VRV " + preresult;
  return false;
}

function calculate2(){
  var contpower = document.getElementById('contpower').value;
  var napor     = document.getElementById('napor').value;

  var res1, res2; 
  var model='Такого оборудования нет';

  res1 =(0.86*contpower/20).toFixed(2);
  res2 =(0.86*contpower/20*1.1).toFixed(2); 

  if (napor>=2.8 && napor<=3.7 && res1>=0 && res1<=0.5) model="WCP 25-40G, WCP32-40G";
  if (napor>=0 && napor<=2.8 && res1>=0.5 && res1<=2) model="WCP 25-40G, WCP32-40G";
  if (napor>=3.7 && napor<=5 && res1>=0 && res1<=0.5) model="WCP 25-60G, WCP32-60G";
  if (napor>=2.8 && napor<=5 && res1>=0 && res1<=2.3) model="WCP 25-60G, WCP32-60G";


  document.getElementById('res1').innerHTML = res1 + " м<sup>3</sup>/час";
  document.getElementById('res2').innerHTML = res2 + " м<sup>3</sup>/час";
  document.getElementById('model').innerHTML = model;
  return false;
}