<!--hide
//Written by Manuel Villanueva

function GttsPerMin(form) {
if (form.charge[0].checked) {
   
//calculate time as hours
var answer = (form.volume.value * form.c.value) / (form.time.value * 60);
}

//calculate time in minutes
else {
var answer = (form.volume.value * form.c.value) / (form.time.value);
}

form.answer.value = Math.round(answer);

//if statements--
if((form.time.value==null)||(form.time.value=="")||(isNaN(form.time.value))){
alert('Please enter time in minutes or hours. Enter only numbers or period for decimal points');
form.time.focus();
form.time.select();
return false
}
if((form.volume.value==null)||(form.volume.value=="")||(isNaN(form.volume.value))){
alert('Please enter mL. Enter only numbers or period for decimal points');
form.volume.focus();
form.volume.select();
return false
}
if((form.c.value==null)||(form.c.value=="")||(isNaN(form.c.value))){
alert('Please enter IV tubing calabration. Enter only numbers or period for decimal points');
form.c.focus();
form.c.select();
return false
}
}
<!--
//  End -->