function calculate_form(){

if((isNaN(document.getElementById('OtherUt').value)==true)||(isNaN(document.getElementById('Phone').value)==true)||(isNaN(document.getElementById('Electricity').value)==true)||(isNaN(document.getElementById('Gas').value)==true)||(isNaN(document.getElementById('Water').value)==true)||(isNaN(document.getElementById('Internet').value)==true)||(isNaN(document.getElementById('Salary').value)==true)||(isNaN(document.getElementById('OtherIncome').value)==true)||(isNaN(document.getElementById('Housing').value)==true)||(isNaN(document.getElementById('Supplies').value)==true)||(isNaN(document.getElementById('Clothing').value)==true)||(isNaN(document.getElementById('Health').value)==true)||(isNaN(document.getElementById('Entertainment').value)==true)||(isNaN(document.getElementById('Food').value)==true)||(isNaN(document.getElementById('Loan').value)==true)||(isNaN(document.getElementById('Other').value)==true)){

alert("Please only use numbers");

}else{

var income = 0

var utility = 0

var expenditures = 0

utility+=Math.round(document.getElementById('OtherUt').value);

utility+=Math.round(document.getElementById('Phone').value);

utility+=Math.round(document.getElementById('Electricity').value);

utility+=Math.round(document.getElementById('Gas').value);

utility+=Math.round(document.getElementById('Water').value);

utility+=Math.round(document.getElementById('Internet').value);

document.getElementById('Utilities').value=Math.round(utility);

income= Math.round((.72*document.getElementById('Salary').value)/12);

income+=Math.round((document.getElementById('Scholarships').value/12));

income+=Math.round(document.getElementById('Grants').value/12);

income+=  Math.round(document.getElementById('OtherIncome').value/12);

expenditures+=Math.round(document.getElementById('Room').value);

expenditures+=Math.round(document.getElementById('Housing').value);

expenditures+=Math.round((document.getElementById('Tuition').value/12));

expenditures+=Math.round((document.getElementById('Books').value/12));

expenditures+=Math.round(document.getElementById('Supplies').value);

expenditures+=Math.round(document.getElementById('Clothing').value);

expenditures+=Math.round(document.getElementById('Health').value);

expenditures+=Math.round(document.getElementById('Utilities').value);

expenditures+=Math.round(document.getElementById('Food').value);

expenditures+=Math.round(document.getElementById('Entertainment').value);

expenditures+=Math.round(document.getElementById('Loan').value);

expenditures+=Math.round(document.getElementById('Car').value);

expenditures+=Math.round(document.getElementById('Childcare').value);

expenditures+=Math.round(document.getElementById('Credit').value);

expenditures+=Math.round(document.getElementById('Other').value);

document.getElementById('NetIncome').value=Math.round(income);

document.getElementById('LeftOver').value=Math.round((income-expenditures),2);

document.getElementById('Expenditures').value=Math.round(expenditures,2);

if(document.getElementById('LeftOver').value<0){

  document.getElementById('LeftOver').style.color="red";

  document.getElementById('Expenditures').style.color="red";

  document.getElementById("errormessage").style.display = "block";

  document.getElementById("message").style.display = "none";

  }else{

  document.getElementById('LeftOver').style.color="black";

  document.getElementById('Expenditures').style.color="black";

  document.getElementById('errormessage').style.display = "none";

  document.getElementById('message').style.display = "block";

  document.getElementById("errormessage").style.display = "none";

  document.getElementById("message").style.display = "block"; 

  }

}

 

}