function calc_email() {
	var sqft 		= document.forms['calc_form'].elements['calc_sqft'].value;
		var acage 		= document.forms['calc_form'].elements['calc_acage'].value;
			var fage 		= document.forms['calc_form'].elements['calc_fage'].value;
				var email 		= document.forms['calc_form'].elements['calc_email_field'].value;
					var ajax_url 	= 'include/calculator.inc.php?cmd=calc_email&email=' + escape(email) + "&sqft=" + sqft + "&ac=" + acage + "&f=" + fage;
						ajaxReadAndLoad(ajax_url, 'NOT USED', _calc_email);
						}

						function _calc_email(divid, xmlObj) {
							window.alert("E-mail sent!");
							}

							function calc_function() {
								var sqft 	= document.forms['calc_form'].elements['calc_sqft'].value;
									var acage 	= document.forms['calc_form'].elements['calc_acage'].value;
										var fage 	= document.forms['calc_form'].elements['calc_fage'].value;

											// CALCULATE AIR CONDITIONING
											    if (acage == '') {
												        document.getElementById('calc_ac').innerHTML = ' ';
														    }
															    else if(Number(sqft) > 0 && acage != '') {
																		if(Number(acage) >= 20)
																					var seer = 8;
																							else if(Number(acage) >= 15)
																										var seer = 9;
																												else if(Number(acage) >= 10)
																															var seer = 10;
																																	else if(Number(acage) >= 5)
																																				var seer = 11;
																																						else if(Number(acage) >= 2)
																																									var seer = 12;
																																											else
																																														var seer = 13;
																																																
																																																		switch(Number(seer)) {
																																																					case 8:
																																																									var current_annual_ac_cost = Number(sqft) * 0.1875;
																																																													break;
																																																																case 9:
																																																																				var current_annual_ac_cost = Number(sqft) * 0.1666;
																																																																								break;
																																																																											case 10:
																																																																															var current_annual_ac_cost = Number(sqft) * 0.15;
																																																																																			break;
																																																																																						case 11:
																																																																																										var current_annual_ac_cost = Number(sqft) * 0.1363;
																																																																																														break;
																																																																																																	case 12:
																																																																																																					var current_annual_ac_cost = Number(sqft) * 0.125;
																																																																																																									break;
																																																																																																												case 13:
																																																																																																																var current_annual_ac_cost = Number(sqft) * 0.1153;
																																																																																																																				break;
																																																																																																																						}
																																																																																																																								var ac_str = "<div class='subheader' style='margin-top:10px;border-bottom: dotted #ccc 1px;font-weight:bold;'>A/C Annual Cost Savings</div>";
																																																																																																																										ac_str 	+= "<table border='0' cellpadding='0' cellspacing='0' width='100%'>"
																																																																																																																														+ "<tr><td width='49%' class='subheader'>SEER Rating</td><td width='2%'>&nbsp;</td><td width='49%' nowrap>" + Number(seer) + "</td></tr>"
																																																																																																																																		+ "<tr><td colspan='3'>&nbsp;</td></tr>"
																																																																																																																																						+ "<tr><td width='49%' class='subheader'>Current Annual A/C Cost</td><td width='2%'>&nbsp;</td><td width='49%' nowrap>$" + Number(current_annual_ac_cost).toFixed(2) + "</td></tr>"
																																																																																																																																										+ "<tr><td width='49%' class='subheader'>Upgraded Annual A/C Cost</td><td width='2%'>&nbsp;</td><td width='49%' nowrap>$" + (Number(sqft) * 0.1153).toFixed(2) + "</td></tr>"
																																																																																																																																														+ "<tr><td colspan='3'>&nbsp;</td></tr>"
																																																																																																																																																		+ "<tr><td width='49%' class='subheader'>Savings Difference</td><td width='2%'>&nbsp;</td><td width='49%' nowrap>$" + ((Number(current_annual_ac_cost)) - (Number(sqft) * 0.1153)).toFixed(2) + "</td></tr>"
																																																																																																																																																						+ "<tr><td width='49%' class='subheader'>Percent Difference</td><td width='2%'>&nbsp;</td><td width='49%' nowrap>" + ((100 * (Number(current_annual_ac_cost) - (Number(sqft) * 0.1153))) / (Number(current_annual_ac_cost))).toFixed(2) + "%</td></tr>"
																																																																																																																																																										+ "</table>"
																																																																																																																																																														+ "</div>";
																																																																																																																																																																
																																																																																																																																																																		document.getElementById('calc_ac').innerHTML = ac_str;
																																																																																																																																																																				showHideDiv('calc_email', 1);
																																																																																																																																																																					}

																																																																																																																																																																						// CALCULATE FURNACE
																																																																																																																																																																						    if (fage == '') {
																																																																																																																																																																							        document.getElementById('calc_f').innerHTML = '&nbsp;';
																																																																																																																																																																									    }
																																																																																																																																																																											if(Number(sqft) > 0 && fage != '') {
																																																																																																																																																																													// calculate afue
																																																																																																																																																																															if(Number(fage) == 20)
																																																																																																																																																																																		var afue = 65;
																																																																																																																																																																																				else if(Number(fage) == 10)
																																																																																																																																																																																							var afue = 80;
																																																																																																																																																																																									else if(Number(fage) == 1)
																																																																																																																																																																																												var afue = 90;

																																																																																																																																																																																														var h_str = "<div class='subheader' style='margin-top:10px;border-bottom: dotted #ccc 1px;font-weight:bold;'>Furnace Annual Cost Savings</div>";
																																																																																																																																																																																																h_str 	+= "<table border='0' cellpadding='0' cellspacing='0' width='100%'>"
																																																																																																																																																																																																				+ "<tr><td width='49%' class='subheader'>AFUE Rating</td><td width='2%'>&nbsp;</td><td width='49%' nowrap>" + Number(afue) + "%</td></tr>"
																																																																																																																																																																																																								+ "<tr><td colspan='3'>&nbsp;</td></tr>"
																																																																																																																																																																																																												+ "<tr><td width='49%' class='subheader'>Current Annual Furnace Cost</td><td width='2%'>&nbsp;</td><td width='49%' nowrap>$" + (Number(sqft) * 0.3).toFixed(2) + "</td></tr>"
																																																																																																																																																																																																																+ "<tr><td width='49%' class='subheader'>Upgraded Annual Furnace Cost</td><td width='2%'>&nbsp;</td><td width='49%' nowrap>$" + (Number(sqft) * 0.2).toFixed(2) + "</td></tr>"
																																																																																																																																																																																																																				+ "<tr><td colspan='3'>&nbsp;</td></tr>"
																																																																																																																																																																																																																								+ "<tr><td width='49%' class='subheader'>Savings Difference</td><td width='2%'>&nbsp;</td><td width='49%' nowrap>$" + ((Number(sqft) * 0.3) - (Number(sqft) * 0.2)).toFixed(2) + "</td></tr>"
																																																																																																																																																																																																																												+ "<tr><td width='49%' class='subheader'>Percent Difference</td><td width='2%'>&nbsp;</td><td width='49%' nowrap>" + (100 * ((Number(sqft) * 0.3) - (Number(sqft) * 0.2)) / (Number(sqft) * 0.3)).toFixed(2) + "%</td></tr>"
																																																																																																																																																																																																																																+ "</table>"
																																																																																																																																																																																																																																				+ "</div>";
																																																																																																																																																																																																																																						
																																																																																																																																																																																																																																								document.getElementById('calc_f').innerHTML = h_str;
																																																																																																																																																																																																																																										showHideDiv('calc_email', 1);
																																																																																																																																																																																																																																											}
																																																																																																																																																																																																																																												
																																																																																																																																																																																																																																													if (fage == '' && acage == '') {
																																																																																																																																																																																																																																															showHideDiv('calc_email', 0);
																																																																																																																																																																																																																																																}
																																																																																																																																																																																																																																																}