//////////////////////////////////////////////////////////////////////////////////

function open_window(url, name, width, height, params){
	//open window centred on screen
	var yCentre = (screen.availHeight / 2) - (height / 2);
	var xCentre = (screen.availWidth / 2) - (width / 2);
	if (!params) params = "resizable=yes, scrollbars=no";
  var options = "width=" + width + ",height=" + height + ", top=" + yCentre + ", left=" + xCentre + ", " + params;
	
	var win = window.open(url, name, options);
	win.focus();

	return win
}

//////////////////////////////////////////////////////////////////////////////////

function openWin(url, ref, width, height) {
  var win = window.open(url, ref, "width=" + width + ",height=" + height + ",statusbar=no,toolbar=no,location=no,menubar=no,scrollbars=no,resizable=no,top=10px,left=10px");
  win.focus();
}

function isEmail(str){
	return /^[^\s()<>@,;:\/]+@\w[\w\.-]+\.[a-z]{2,}$/i.test(str)
}

function isPostCode(postalCode){
	var validFormat = /^(\d{5}(-\d{4})?|[a-z]{1,2}[\da-z]{1,2} ?\d[a-z][a-z])$/i
	return validFormat.test(postalCode);
}