Factoring out Code

Hi,

I have a function that is repeating itself and i reckon i can factor out a lot of the code. Check it out:

function caldis(){

	contotal = totalconns()

	cons1 = parseInt(document.priceform.num1.value)
	cons2 = parseInt(document.priceform.num2.value)
	cons3 = parseInt(document.priceform.num3.value)
	cons4 = parseInt(document.priceform.num4.value)
	cons5 = parseInt(document.priceform.num5.value)
	cons6 = parseInt(document.priceform.num6.value)
	cons7 = parseInt(document.priceform.num7.value)
	cons8 = parseInt(document.priceform.num8.value)
	/*cons9 = parseInt(document.priceform.num9.value)
	cons10 = parseInt(document.priceform.num10.value)
	cons11 = parseInt(document.priceform.num11.value)
	cons12 = parseInt(document.priceform.num12.value)
	cons13 = parseInt(document.priceform.num13.value)*/
	
	pr1 = document.getElementById('price1').innerHTML.substring(1,10)
	pr2 = document.getElementById('price2').innerHTML.substring(1,10)
	pr3 = document.getElementById('price3').innerHTML.substring(1,10)
	pr4 = document.getElementById('price4').innerHTML.substring(1,10)
	pr5 = document.getElementById('price5').innerHTML.substring(1,10)
	pr6 = document.getElementById('price6').innerHTML.substring(1,10)
	pr7 = document.getElementById('price7').innerHTML.substring(1,10)
	pr8 = document.getElementById('price8').innerHTML.substring(1,10)
	
	if (cons1 == 0){
		document.getElementById('discount1new').innerHTML='\u0024'+0
	}
	else if (cons1 > 0){
		

document.getElementById('discount1new').innerHTML='\u0024'+discountPrice(pr1,contotal)
	}
	if (cons2 == 0){
		document.getElementById('discount2new').innerHTML='\u0024'+0
	}
	else if (cons2 > 0){
		

document.getElementById('discount2new').innerHTML='\u0024'+discountPrice(pr2,contotal)
	}
	if (cons3 == 0){
		document.getElementById('discount3new').innerHTML='\u0024'+0
	}
	else if (cons3 > 0){
		

document.getElementById('discount3new').innerHTML='\u0024'+discountPrice(pr3,contotal)
	}
	if (cons4 == 0){
		document.getElementById('discount4new').innerHTML='\u0024'+0
	}
	else if (cons4 > 0){
		

document.getElementById('discount4new').innerHTML='\u0024'+discountPrice(pr4,contotal)
	}
	if (cons5 == 0){
		document.getElementById('discount5new').innerHTML='\u0024'+0
	}
	else if (cons5 > 0){
		

document.getElementById('discount5new').innerHTML='\u0024'+discountPrice(pr5,contotal)
	}
	if (cons6 == 0){
		document.getElementById('discount6new').innerHTML='\u0024'+0
	}
	else if (cons6 > 0){
		

document.getElementById('discount6new').innerHTML='\u0024'+discountPrice(pr6,contotal)
	}
	if (cons7 == 0){
		document.getElementById('discount7new').innerHTML='\u0024'+0
	}
	else if (cons7 > 0){
		

document.getElementById('discount7new').innerHTML='\u0024'+discountPrice(pr7,contotal)
	}
	if (cons8 == 0){
		document.getElementById('discount8new').innerHTML='\u0024'+0
	}
	else if (cons8 > 0){
		

document.getElementById('discount8new').innerHTML='\u0024'+discountPrice(pr8,contotal)
	}
	
}

Code (markup):

Im thinking that I will pass a parameter through the function like

function caldis(x){
}

Code (markup):

then maybe put

id = x to carry the number

how would i refer to that throughout the function for example i want to do something like this:

cons(id) = parseInt(document.priceform.num(id).value)

Code (markup):

instead of this:

cons1 = parseInt(document.priceform.num1.value)
cons2 = parseInt(document.priceform.num2.value)
etc....

Code (markup):

I cant get the syntax right for this, or I am on the wrong path??