/* - - - - - - - - - - - - - - - - - - - - - - -
 JavaScript
 Monday, September 18, 2006 6:28:08 PM
 HAPedit 3.1.11.111
 - - - - - - - - - - - - - - - - - - - - - - - */
 function creatCalc(form) {
  var weight = Number(form.w.value);
  var age = Number(form.age.value);
  var cr = Number(form.Cr.value);

  if (!checkNum(weight,"WEIGHT")) {
    form.w.select();
    form.w.focus();
    return false
  }

  if (!checkNum(age,"AGE")) {
    form.age.select();
    form.age.focus();
    return false
  }

  if (!checkNum(cr,"CREATININE")) {
    form.Cr.select();
    form.Cr.focus();
    return false
  }

  if (form.wu.selectedIndex == 0) {
          //  What units for weight?
          //  0 = lbs
          //  1 = kg
    weight = weight * 0.45359237;
  }

  clear = ((140 - age) * weight) / (72 * cr);

  if (form.sex[1].checked) {  //  Is the patient female?
          //  0 = male
          //  1 = female

    clear = clear * 0.85;
  }

  clear = rounding(clear,0);
  form.clear.value = clear;

  return true
}


function checkNum(val,text) {
  if ((val == null) || (isNaN(val)) || (val == "") || (val < 0)) {
    alert("Please enter a value for " + text + ".");
    return false
    }
  return true;
}

function rounding(number,decimal) {
        multiplier = Math.pow(10,decimal);
        number = Math.round(number * multiplier) / multiplier;
        return number
}