//these vars are the various offer graphics displayed depending on user's calculator response

var offer_img_12 = "images/calc/calc_ans_12.gif";
var offer_img_9 = "images/calc/calc_ans_9.gif";
var offer_img_6 = "images/calc/calc_ans_6.gif";

function iscomplete()
{
	var complete = true;
	
	for(i=1; i < 4; i++)
	{
		objone = eval("document.calc.q" + i);
		
		if(objone[0].checked == true || objone[1].checked == true)
		{			
			//yer or no is selected, do nothing			
		}
		else
		{
			complete = false;
		}
	}
	return complete;
}

function calculate_offer()
{
	form_complete = iscomplete();
	
	if(form_complete == true)
	{
		display_offer();
		//alert("form complete!");
	}
}

function display_offer()
{
	//if the offer offer is changed the var 'alt_suffix' will have to be updated to reflect the new text in the graphics
	
	object = eval("document.calc");
	alt_suffix = " MONTHS HALF-PRICE BROADBAND ACCESS² on 24 month plans PLUS $129 OFF A WIRELESS MODEM OR MOBILE CARD³";
	if(object.q1[0].checked == true)
	{
		document.answer.style.display = "block";
		document.answer_no_offer.style.display = "none";
			
		if(object.q2[0].checked == true && object.q3[0].checked == true)
		{
			//alert("12 month");
			document.answer.src = offer_img_12;
			document.answer.alt = "12" + alt_suffix;
		}
		else if(object.q2[0].checked == true && object.q3[1].checked == true)
		{
			//alert("9 month");
			document.answer.src = offer_img_9;
			document.answer.alt = "9" + alt_suffix;
		}
		else if(object.q2[1].checked == true && object.q3[0].checked == true)
		{
			//alert("9 month");
			document.answer.src = offer_img_9;
			document.answer.alt = "9" + alt_suffix;
		}
		else
		{
			//alert("6 month");
			document.answer.src = offer_img_6;
			document.answer.alt = "6" + alt_suffix;
		}
	}
	else
	{
		//no offer, remeber to keep alt tag updated
		document.answer.style.display = "none";
		document.answer_no_offer.style.display = "block";
		document.answer_no_offer.alt = "If you aren't already a Telstra full service fixed phone customer, you have 30 days from your wireless broadband account being activated to apply to become one, to qualify for this offer.  Sign up online now, and visit www.telstra.com.au/switchphone to switch your services to eligible Telstra services.";
	}
}

function reset_calc()
{
	object = eval("document.calc");
	
	object.q1[0].checked = false;
	object.q1[1].checked = false;
	object.q2[0].checked = false;
	object.q2[1].checked = false;
	object.q3[0].checked = false;
	object.q3[1].checked = false;

}

function new_window(aPage, aTarget, w, h, var1, var2)
{
	var winl = (screen.width - w) / 2;
	var wint = (screen.height - h) / 2;
	
	child = window.open(aPage,aTarget,'status=no,top=0,left=0,scrollbars=' +((var1=='scroll' || var2=='scroll')? 'yes' : 'no')+ ',resizable=' +((var1=='resize' || var2=='resize')? 'yes' : 'no')+ ',width='+w+',height='+h +',left = '+winl +',top = ' +wint);

	if (window.focus) 
	{
		child.focus();
	}
	return false;
}