var computed = 0;
function hide_bg()
{
	document.getElementById('energy_calc').style.backgroundPosition = "0px -300px";
}

function adjust_measurements()
{
	var ec_form = document.getElementById("ec_form");

	var a = (!isNaN(ec_form.elements[0].value)) ? ec_form.elements[0].value : 1;
	var b = (!isNaN(ec_form.elements[1].value)) ? ec_form.elements[1].value : 0.101;
	var c = ec_form.elements[2].value;
	var d = (!isNaN(ec_form.elements[3].value)) ? ec_form.elements[3].value : 2.79;
	var e = ec_form.elements[5].value;
	var f = 10000;
	var g = (!isNaN(ec_form.elements[4].value)) ? ec_form.elements[4].value : 0.50;
	var h = ec_form.elements[6].value;
	var i = 750;
	
	var j = (a*c*365*e)/1000;
	var k = b*j;
	var l = 0;
		
	var n = (a*c*365*h)/1000;
	var m = n*b;

	if(i==750)
		var tmpi = .5;
	else
		var tmpi = .7;
	var o = a*((20*.15)+parseFloat(g))*(1/tmpi)
	var p = m-k;
	var q = n-j;
		
	var r = o;
	var s = p+r;

	if(computed == 1 && Math.round(s) != 0)
		document.getElementById('energy_calc').style.backgroundPosition = "0px 0px";
	else
		document.getElementById('energy_calc').style.backgroundPosition = "0px -300px";

	document.getElementById('ec_result').innerHTML = "$" + Math.round(s);

	computed = 1;
}

function showhide_search(el)
{
	var input = document.getElementById(el);

	if(input.value == 'Product Search')
		input.value = '';
	else if(input.value != input.defaultvalue && input.value == '')
		input.value = 'Product Search';
}