window_handle = null;

function open_popup_window(_url,_width, _height) {
    if (window_handle) window_handle.close();
    if (_width<1) { _width = 300; }
    if (_height<1) { _height = 300; }
    window_handle = window.open(_url,'popupWindowName1','status=no,width='+(_width+20)+',height='+(_height+20)+',screenX=50,screenY=50,left=50,top=50');
}

function isEmailValid(emailstring) {
	if (!emailstring.match(/^[a-z0-9+]{1}[a-z_0-9-\.]*@[a-z0-9]{1}[a-z0-9-]*(\.[a-z0-9]{1}[a-z0-9-]*)+$/gi)) {
		return false;
	}
	return true;
}

function jstrim(s) {
    return s.replace(/(^\s+)|(\s+$)/g, "");
}