function $(element) {
  return document.getElementById(element);
} 

function ShowForm(div_name) {
	var obj = document.getElementById(div_name);
	if (obj.style.display=="block") {
		obj.style.display="none";
	} else {
		obj.style.display="block";
	}
}
function HideForm(div_name) {
	var obj = document.getElementById(div_name);
	obj.style.display="none";
}

function ViewPhoto(file_name, w, h) {
    scr_left = (screen.availWidth - w)/2;
	scr_top = (screen.availHeight - h)/2;
    window.open ("/view.php?file_name="+escape(file_name), "window", "location=no,menubar=no,resizable=no,scrollbars=no,status=no,toolbar=no,width="+w+",height="+h+",top="+scr_top+",left="+scr_left);
}

function ReCalc() {
	document.frm.act.value = "recalc";
	document.frm.submit();
	return true;
}

function RecalcAndOrder() {
	
	var isErr = 0;
	//валидация полей формы
	if (document.frm.phone.value == "") {$('frm_phone').className = "empty_filed";isErr = 1;} 
	else { $('frm_phone').className = "field"; }

	if (document.frm.address.value == "") {$('frm_address').className = "empty_filed";isErr = 1;} 
	else { $('frm_address').className = "field"; }
	
	if (isErr) {
		$('err_msg').style.display="block";
		return false;
	} else {
		$('err_msg').style.display="none";
	}
	
	document.frm.act.value = "recalc_and_order";
	document.frm.submit();
	return true;
}

function CheckAskForm() {
	
	var isErr = 0;
	//валидация полей формы
	if (document.frm.name.value == "") {frm_name.className = "empty_filed";isErr = 1;} 
	else { frm_name.className = "field"; }

	if (document.frm.comments.value == "") {frm_comments.className = "empty_filed";isErr = 1;} 
	else { frm_comments.className = "field"; }

	
	if (isErr) {
		err_msg.style.display="block";
		return false;
	} else {
		err_msg.style.display="none";
	}
	
	document.frm.act.value = "ask";
	document.frm.submit();
	return true;
}