function isNumber(field) {
        var re = /^[0-9]*$/;
        if (!re.test(field.value)) {
            alert('Value must be all numberic charcters, non numerics will be removed from field by LEENYX!');
            field.value = field.value.replace(/[^0-9]/g,"");
        }
        else{var x= document.calco.dollar.value;
var y=parseInt(x);

switch(y){

case 20:document.getElementById('rial').innerHTML=null;
  document.getElementById('rial').innerHTML=39000;
  document.calco.Amount.value=390000;

  break;
  
case 25:document.getElementById('rial').innerHTML=null;
  document.getElementById('rial').innerHTML=45000;
    document.calco.Amount.value=450000;

  break;
  
case 30:document.getElementById('rial').innerHTML=null;
  document.getElementById('rial').innerHTML=49000;
    document.calco.Amount.value=490000;

  break;
  
case 50:document.getElementById('rial').innerHTML=null;
  document.getElementById('rial').innerHTML=75000;
    document.calco.Amount.value=750000;

  break;
  
case 75:document.getElementById('rial').innerHTML=null;
  document.getElementById('rial').innerHTML=99000;
    document.calco.Amount.value=990000;

  break;
  
case 100:document.getElementById('rial').innerHTML=null;
  document.getElementById('rial').innerHTML=139000;
    document.calco.Amount.value=1390000;

  break;
  
case 125:document.getElementById('rial').innerHTML=null;
  document.getElementById('rial').innerHTML=169000;
    document.calco.Amount.value=1690000;

  break;
  
case 150:document.getElementById('rial').innerHTML=null;
  document.getElementById('rial').innerHTML=189000;
    document.calco.Amount.value=1890000;

  break;
  
case 175:document.getElementById('rial').innerHTML=null;
  document.getElementById('rial').innerHTML=219000;
    document.calco.Amount.value=2190000;

  break;
  
case 200:document.getElementById('rial').innerHTML=null;
  document.getElementById('rial').innerHTML=259000;
    document.calco.Amount.value=2590000;

  break;
  
case 250:document.getElementById('rial').innerHTML=null;
  document.getElementById('rial').innerHTML=309000;
    document.calco.Amount.value=3090000;

  break;
  
case 300:document.getElementById('rial').innerHTML=null;
  document.getElementById('rial').innerHTML=359000;
    document.calco.Amount.value=3590000;

  break;
  
case 350:document.getElementById('rial').innerHTML=null;
  document.getElementById('rial').innerHTML=409000;
    document.calco.Amount.value=4090000;

  break;
  
case 400:document.getElementById('rial').innerHTML=null;
  document.getElementById('rial').innerHTML=469000;
  document.calco.Amount.value=4690000;

  break;
  
case 450:document.getElementById('rial').innerHTML=null;
  document.getElementById('rial').innerHTML=529000;
  document.calco.Amount.value=5290000;

  break;
  
case 500:document.getElementById('rial').innerHTML=null;
  document.getElementById('rial').innerHTML=579000;
  document.calco.Amount.value=5790000;

  break;

default:
calc2(y);

}}

function calc2(b){
  if (b<25 || b>500)
 {
 document.getElementById('rial').innerHTML="Minimum Is $25 | Maximum Is $500";
 document.calco.Amount.value=""}
 else if (b>25 && b<30)
 {var a1=parseInt((b)*0.56);c1=a1+b;document.getElementById('rial').innerHTML=c1*1000;document.calco.Amount.value=c1*10000;}
 else if (b>30 && b<50)
 {var a1=parseInt((b)*0.45);c1=a1+b;document.getElementById('rial').innerHTML=c1*1000;document.calco.Amount.value=c1*10000;}
 else if (b>50 && b<75)
 {var a1=parseInt((b)*0.35);c1=a1+b;document.getElementById('rial').innerHTML=c1*1000;document.calco.Amount.value=c1*10000;}
 else if (b>75 && b<100)
 {var a1=parseInt((b)*0.40);c1=a1+b;document.getElementById('rial').innerHTML=c1*1000;document.calco.Amount.value=c1*10000;}
 else if (b>100 && b<125)
 {var a1=parseInt((b)*0.40);c1=a1+b;document.getElementById('rial').innerHTML=c1*1000;document.calco.Amount.value=c1*10000;}
 else if (b>125 && b<150)
 {var a1=parseInt((b)*0.40);c1=a1+b;document.getElementById('rial').innerHTML=c1*1000;document.calco.Amount.value=c1*10000;}
 else if (b>150 && b<175)
 {var a1=parseInt((b)*0.30);c1=a1+b;document.getElementById('rial').innerHTML=c1*1000;document.calco.Amount.value=c1*10000;}
 else if (b>175 && b<200)
 {var a1=parseInt((b)*0.30);c1=a1+b;document.getElementById('rial').innerHTML=c1*1000;document.calco.Amount.value=c1*10000;}
 else if (b>200 && b<250)
 {var a1=parseInt((b)*0.30);c1=a1+b;document.getElementById('rial').innerHTML=c1*1000;document.calco.Amount.value=c1*10000;}
 else if (b>250 && b<300)
 {var a1=parseInt((b)*0.20);c1=a1+b;document.getElementById('rial').innerHTML=c1*1000;document.calco.Amount.value=c1*10000;}
 else if (b>300 && b<350)
 {var a1=parseInt((b)*0.20);c1=a1+b;document.getElementById('rial').innerHTML=c1*1000;document.calco.Amount.value=c1*10000;}
 else if (b>350 && b<400)
 {var a1=parseInt((b)*0.20);c1=a1+b;document.getElementById('rial').innerHTML=c1*1000;document.calco.Amount.value=c1*10000;}
 else if (b>400 && b<450)
 {var a1=parseInt((b)*0.20);c1=a1+b;document.getElementById('rial').innerHTML=c1*1000;document.calco.Amount.value=c1*10000;}
 else if (b>450 && b<500)
 {var a1=parseInt((b)*0.20);c1=a1+b;document.getElementById('rial').innerHTML=c1*1000;document.calco.Amount.value=c1*10000;}
}
    }