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//Written by Manuel Villanueva 3/22/04
function GttsPerMin(form) {

var volume = form.volume.value;
var calibration = form.c.value;
var time = form.time.value;

if (form.option[0].checked) {
   
//calculate time as hours

var answer = (volume * calibration) / (time * 60);
var answer2 = (volume * calibration) / (time * 60) /4;
form.answer.value = Math.round(answer);
form.answer2.value = Math.round(answer2);
}

//calculate time in minutes

if (form.option[1].checked) {

var answer = (volume * calibration) / time;
var answer2 = (volume * calibration) / time /4;
form.answer.value = Math.round(answer);
form.answer2.value = Math.round(answer2);
}

//converts cc/hr to gtt/min

if (form.option[2].checked) {

var answer = (time * calibration) / 60;
var answer2 = (time * calibration) / 60 /4;
form.answer.value = Math.round(answer);
form.answer2.value = Math.round(answer2);
}


//if statements--
if((form.time.value==null)||(form.time.value=="")||(isNaN(form.time.value))){
alert('Please enter minutes, hours or ml/hr. Enter only numbers or period for decimal points');
form.time.focus();
form.time.select();
return false
}
if((form.volume.value==null)&&(form.option[2].checked==false)||(form.volume.value=="")&&(form.option[2].checked==false)||(isNaN(form.volume.value)&&(form.option[2].checked==false))){
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 calibration. Enter only numbers or period for decimal points');
form.c.focus();
form.c.select();
return false
}
}
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