// JavaScript Document
var nav4 = window.Event ? true : false;

//Only Allow Numbers
function onlyNumber(evt){
// NOTE: Backspace = 8, Enter = 13, '0' = 48, '9' = 57
var key = nav4 ? evt.which : evt.keyCode;
return (key <= 13 || (key >= 48 && key <= 57));
}


//Clear form
function clearcalculator(){
    document.getElementById('result_m').innerHTML = '$0.0';;
	document.getElementById('result_y1').innerHTML = '$0.0';	
	document.getElementById('result_y2').innerHTML = '$0.0';	
	document.getElementById('result_y3').innerHTML = '$0.0';	
	document.getElementById('nrocomputer').value = '1'; //Numero de Computadoras
	document.getElementById('space').value = '';  //Espacio Caja de Texto
	document.getElementById('payperiod').selectedIndex=0;//Perido de Pago	
	return false;
}


/* Determines if multiple, returns
what needs to be a multiple of 5 */
function rest_105(space){

    space = String(space);
    	
    if ( space.charAt(space.length-1) == '0' ||  space.charAt(space.length-1) == '5' ||  space.length == 1) {
        return 0;
     
     } else {
     
          if (space.charAt(space.length-1) < 5){
               
          
          	return (5 - space.charAt(space.length-1));
         } 	
          else
         {     
                return (10 - space.charAt(space.length-1));
                
         } 
     
     }
}


function calculate_with_period (r, payperiod){
	  
	  if (payperiod == 0)
	     divisor = 1;
	  else if (payperiod == 1)
	     divisor = 12;
	  else if (payperiod == 3)
	     divisor = 24;
	  else if (payperiod == 6)
	     divisor = 36;
	  
	result = ((r * divisor) - (r * payperiod))/divisor;	
	
     // result = Math.round(result*100)/100;
     result = result;

     return result;

}

/*
	Returns the price as required space
*/

function calculate(){

var r = 0, space = 0;
/*4 fields on the form which should not change its name to usrlos*/
nrocomputer = document.getElementById('nrocomputer').value; //Number of Computers
space_input = document.getElementById('space').value;  //Text Box Area
//space_select = document.getElementById('space_select').options[document.getElementById('space_select').selectedIndex].value; //Space Select
payperiod = document.getElementById('payperiod').options[document.getElementById('payperiod').selectedIndex].value;//Payment Period

if (space_input) {
	space = parseFloat(space_input);
	//document.getElementById('space_select').selectedIndex = 0;
} 

/*if (space_select!="0"){
	space = parseFloat(space_select);
    document.getElementById('space').value = "";	
} */

if (nrocomputer!="0" && nrocomputer!="") {
	nrocomputer = parseInt(nrocomputer);
}else{
	document.getElementById('nrocomputer').value = '1';
	nrocomputer = 1;
}
	
if (payperiod){
  payperiod = parseInt(payperiod);	
}else{
  payperiod = 0;
}

 
 
 
if (space){
 //set number to a multiple of 5
 space = space + rest_105(space);
}

//Superior a 100
if (space > 100)
{
        //Calculo con 2$
        r = 100 * 2;
        
    // Superior a 100
	if (space > 100 && space >= 200 )
	{

        //Calculo con 1.75
		r = r + (100 * 1.75);

		// Superior a 200
		if (space > 200 && space >= 300 ){

            //calculo con 1.50
			r = r + (100 * 1.50);

			// Superior a 300
			if (space > 300 && space >= 400 ){

                //calulo con 1.25   
				r = r + (100 * 1.25);

				//Superior a 400
				if (space > 400){
					r = r + (space - 400) * 1;
				}
			}else{
				//calculate the rest  
				r = r  + ((space - 300) * 1.25);

			}

		}else{
			 //calculate the rest
		     r = r  + ((space - 200) * 1.50);
		}

	} else {
        //calculate the rest  
		r = r  + ((space - 100) * 1.75);
	}
} else {

	/*if (space > 0 &&  space <= 0.5)
	  r = 7;*/

	/*if (space > 0 && space <= 2.5)
	  r = 15;*/

	if (space > 0 &&  space <= 5)
	  r = 25;

	if (space > 5 &&  space <= 10)
	  r = 35;
	  
	if (space > 10 &&  space <= 25)
	  r = 50;
	  
	  
	  cont = 25;
	  _stop = 0;
	  
	while (cont != 100 && _stop == 0){
	
	   cont = cont + 5;
	   
	   if (space > cont-5 && space <= cont ){
	     r = cont * 2;
	     _stop = 1;
	   }
	}  
} 

div_m=document.getElementById('result_m');
div_y1=document.getElementById('result_y1');
div_y2=document.getElementById('result_y2');
div_y3=document.getElementById('result_y3');
    
	//r = r * nropc;
	nrocomputer = nrocomputer - 1;
	if (nrocomputer>0 && space){
	  r = (r + nrocomputer * 5);
	}	

      
	  rx = calculate_with_period (r, payperiod);
	  
	  
	  //Calculated as total monthly cost for years and then
/*	
	  rm = Math.round(rx*100)/100;
	  ry1 = Math.round(rx*12*100)/100;
	  ry2 = Math.round(rx*24*100)/100;
	  ry3 = Math.round(rx*36*100)/100;
	
*/	
	//Discount Calculated
/*	  

      rm = calculate_with_period (r, payperiod);
	  ry1 = Math.round(calculate_with_period (r, 1)*12*100)/100;
	  ry2 = Math.round(calculate_with_period (r, 3)*24*100)/100;
	  ry3 = Math.round(calculate_with_period (r, 6)*36*100)/100;	
	  
	  
	  */  
     //No decimals
      rm = Math.round(calculate_with_period (r, payperiod)*100)/100;
	  ry1 =calculate_with_period (r, 1)*12;
	  ry2 = calculate_with_period (r, 3)*24;
	  ry3 = calculate_with_period (r, 6)*36;	


    if (r) {
		div_m.innerHTML = '$'+rm;
		div_y1.innerHTML = '$'+ry1;
		div_y2.innerHTML = '$'+ry2;
		div_y3.innerHTML = '$'+ry3;
    }else{
	    div_m.innerHTML = '$0.0';	
		div_m.innerHTML = '$0.0';
		div_y1.innerHTML = '$0.0';
		div_y2.innerHTML = '$0.0';
		div_y3.innerHTML = '$0.0';		
	}
	
	if (space >= 1000) {
		div_m.innerHTML = 'Contact us for special pricing';
		div_y1.innerHTML = '-';
		div_y2.innerHTML = '-';
		div_y3.innerHTML = '-';
    }
	
	return false;
	
 }