function drunk(form)
{  form.gend.value = '';
   var weight = eval(form.weight.value);
   var time = eval(form.time.value);
   var balc = 0;
   var r = 0;
   var r2 = 0;
   var a = 0;
   var num1 = eval(form.num1.value); 
   var percent1 = eval(form.percent1.value); 
   var num2 = eval(form.num2.value); 
   var percent2 = eval(form.percent2.value); 
   var num3 = eval(form.num3.value); 
   var percent3 = eval(form.percent3.value); 
   var num4 = eval(form.num4.value); 
   var percent4 = eval(form.percent4.value); 
   var num5 = eval(form.num5.value); 
   var percent5 = eval(form.percent5.value); 
   var num6 = eval(form.num6.value); 
   var percent6 = eval(form.percent6.value); 

   if (num1 == null)     {  var num1 = 0;}
   if (percent1 == null) {  var percent1 = 0; }
   if (num2 == null)     {  var num2 = 0; }
   if (percent2 == null) {  var percent2 = 0; }
   if (num3 == null)     {  var num3 = 0; }
   if (percent3 == null) {  var percent3 = 0; }
   if (num4 == null)     {  var num4 = 0; }
   if (percent4 == null) {  var percent4 = 0; }
   if (num5 == null)     {  var num5 = 0; }
   if (percent5 == null) {  var percent5 = 0; }
   if (num6 == null)     {  var num6 = 0; }
   if (percent6 == null) {  var percent6 = 0; }

   if (! form.check1.checked) { var num1 = 0; var percent1 = 0; }
   if (! form.check2.checked) { var num2 = 0; var percent2 = 0; }
   if (! form.check3.checked) { var num3 = 0; var percent3 = 0; }
   if (! form.check4.checked) { var num4 = 0; var percent4 = 0; }
   if (! form.check5.checked) { var num5 = 0; var percent5 = 0; }
   if (! form.check6.checked) { var num6 = 0; var percent6 = 0; }


   if (weight == null) {  form.weight.value = 0; var weight = 0;}
   if (time == null)   {  form.time.value = 0; var time = 0;}
 
   if (form.gender[0].checked)
   {  a = 0;
      r = .68;
      r2 = weight * r;
      a = num1 * (percent1 * .01);
      a = a + num2 * (percent2 * .01); 
      a = a + num3 * (percent3 * .01); 
      a = a + num4 * (percent4 * .00625);
      a = a + num5 * (percent5 * .00625);
      a = a + num6 * (percent6 * .00625);
      a = (a * .0514 * 100 * 1.055) / r2;
      a = a - (time * .017);
      form.gend.value = a;
   }
     
   if (form.gender[1].checked)
   {  a = 0;
      r = .58;
      r2 = weight * r;
      a = num1 * (percent1 * .01);
      a = a + num2 * (percent2 * .01); 
      a = a + num3 * (percent3 * .01);  
      a = a + num4 * (percent4 * .00625);
      a = a + num5 * (percent5 * .00625);
      a = a + num6 * (percent6 * .00625);
      a = (a * .0514 * 100 * 1.055) / r2;
      a = a - (time * .017);
      form.gend.value = a;

   
   }
}