function addValues (value) {

var myForm = document.timeCalculator;



if(myForm.total_time.value.length > 0){

var the_hours = parseInt(myForm.total_time.value.substring(0,myForm.total_time.value.indexOf(":")));

var the_minutes = parseInt(myForm.total_time.value.substring(myForm.total_time.value.indexOf(":")+1,myForm.total_time.value.lastIndexOf(":")));

var the_seconds = parseInt(myForm.total_time.value.substring(myForm.total_time.value.lastIndexOf(":")+1,myForm.total_time.value.length));

}

else{

var the_hours = 0;

var the_minutes = 0;

var the_seconds = 0;

}



var form_hours = parseFloat(myForm.frm_hours.value);

var form_minutes = parseFloat(myForm.frm_minutes.value);

var form_seconds = parseFloat(myForm.frm_seconds.value);

if (isNaN(form_hours)) {form_hours = 0;}

if (isNaN(form_minutes)) {form_minutes = 0;}

if (isNaN(form_seconds)) {form_seconds = 0;}

myForm.frm_hours.value = form_hours;

myForm.frm_minutes.value = form_minutes;

myForm.frm_seconds.value = form_seconds;



form_seconds = (form_hours * 60 * 60) + (form_minutes * 60) + form_seconds;

form_hours = 0; form_minutes = 0;

while(form_seconds >= 60){form_seconds = form_seconds - 60;form_minutes++;}

while(form_minutes >= 60){form_minutes = form_minutes - 60;form_hours++;}



the_hours = value * form_hours + the_hours;

the_minutes = value * form_minutes + the_minutes;

the_seconds = value * form_seconds + the_seconds;



while(the_seconds >= 60){the_seconds = the_seconds - 60;the_minutes++;}

while(the_minutes >= 60){the_minutes = the_minutes - 60;the_hours++;}

while(the_seconds < 0){the_seconds += 60;the_minutes--;}

while(the_minutes < 0){the_minutes += 60;the_hours--;}



the_seconds = Math.round(the_seconds *10000)/10000;



myForm.total_time.value = "" + the_hours + ":" + the_minutes + ":" + the_seconds;



var tempDecimal = the_hours + (the_minutes / 60) + (the_seconds / 60 / 60);

tempDecimal = Math.round(tempDecimal *10000)/10000;

myForm.total_time_decimal.value = "" + tempDecimal + " hours";

}



function resetValues(){

var myForm = document.timeCalculator;



myForm.frm_hours.value = "";

myForm.frm_minutes.value = "";

myForm.frm_seconds.value = "";



myForm.total_time.value = "0:0:0";

myForm.total_time_decimal.value = "0 hours";

}