var can_clr = false;

function make_priview(path) {
    document.getElementById('preview').style.visibility = 'visible';    document.getElementById('preview').src = path;
    can_clr = false;
}

function clr() {
	if (can_clr)
	  document.getElementById('preview').style.visibility = 'hidden';
}

function remove_priview() {	can_clr = true;
    setTimeout("clr()", 1000);
}