function confirmSubmit()
{
	var agree = confirm("Are you sure you wish to continue?");

	if (agree)
	{
		return true;
	}
	else
	{
		return false ;
	}
}

function show_calc()
{
	document.getElementById('hidden_frame').src = 'mortcalc.php';
	document.getElementById('hidden_frame').style.display = 'none';
	document.getElementById('transp').style.display = 'none';
}

function hide_iframe()
{
	parent.document.getElementById('hidden_frame').src = '';
	parent.document.getElementById('hidden_frame').style.display = 'none';
	parent.document.getElementById('transp').style.display = 'none';
}

function change_image(imagename)
{
	document.getElementById('gallery').innerHTML = '<a href="media/images/'+imagename+'" class="thickbox"><img src="media/thumbs/'+imagename+'" class="imageframe" width="300" border="0" /></a>';
}

// Slideshow
function floor(number)
{
	return Math.floor(number*Math.pow(10,2))/Math.pow(10,2);
}

function dosum()
{
	var mi = document.temps.IR.value / 1200;
	var base = 1;
	var mbase = 1 + mi;
	for (i=0; i<document.temps.YR.value * 12; i++)
	{
		base = base * mbase;
	}

	document.temps.PI.value = floor(document.temps.LA.value * mi / ( 1 - (1/base)))
	document.temps.MT.value = floor(document.temps.AT.value / 12)
	document.temps.MI.value = floor(document.temps.AI.value / 12)
	var dasum = document.temps.LA.value * mi / ( 1 - (1/base)) +
	document.temps.AT.value / 12 +
	document.temps.AI.value / 12;
	document.temps.MP.value = floor(dasum);
}

function slideshow_ctrl()
{
	if (stop == 0)
	{
		stop = 1;
		step_it();
	}
	else
	{
		stop = 0;
		loop_count = 0;
		clearTimeout(timeout_id);
	}
}

function step_it()
{
	if (pos == imgArray.length - 1)
	{
		pos = 0;
		loop_count++;
	}
	else
	{
		pos++;
	}

	if (loop_count >= 3)
	{
		slideshow_ctrl();
	}
	else
	{
		timeout_id=setTimeout("step_it()",5000);
	}

	document.getElementById('mainimage').src = imgDir + imgArray[pos];
}