function send_message(){

	var name = document.getElementById("form-name");
	var email = document.getElementById("form-mail");
	var content = document.getElementById("coment-message");
	if( name.value == "" ){
		alert("Please fill in your name!");
		name.focus();
		return;
	}
	if( email.value == "" ){
		alert("Please fill in your email!");
		email.focus();
		return;
	}
	if( content.value == "" ){
		alert("Please write your message!");
		content.focus();
		return;
	}
	document.fmain.submit();
}
function overlay() {
	el = document.getElementById("overlay");
	el.style.visibility = (el.style.visibility == "visible") ? "hidden" : "visible";
}
function change_img(){
	el = document.getElementById("gallery_img_sell");
	document.location = 'gallery-ir-' + el.value;
}