var ns4=document.layers 
var ie4=document.all 
var ns6=document.getElementById&&!document.all 
function show(div){ 
if (ns4) 
eval('crossobj=document.layers.'+div); 
else if (ie4||ns6) 
eval('crossobj=ns6? document.getElementById("'+div+'") : document.all.'+div) 
if (ie4||ns6)
crossobj.style.visibility="visible" 
else if (ns4) 
crossobj.visibility="show" 
} 
function hide(div){ 
if (ns4) 
eval('crossobj=document.layers.'+div); 
else if (ie4||ns6) 
eval('crossobj=ns6? document.getElementById("'+div+'") : document.all.'+div) 
if (ie4||ns6) 
crossobj.style.visibility="hidden" 
else if (ns4) 
crossobj.visibility="hide" 
} 
function is_name(str){
	buscar = /^\D{3,20}[ ]?\D{0,20}[ ]?\D{0,20}$/;
	return str.match(buscar);
}
function is_mail(str){
	buscar = new RegExp("^([-!#$%&'*+./0-9=?A-Z^_`a-z{|}~])+@([-!#$%&'*+/0-9=?A-Z^_`a-z{|}~]+\.)+[a-zA-Z]{2,6}$");
	return str.match(buscar);
}
function is_tel(str){
	buscar = /^\d{3,12}[ -]?\d{2,11}$/;
	return str.match(buscar);
}
function is_code(str){
	buscar = /^\d{0,5}$/;
	return str.match(buscar);
}
function imagen(id, width, height){
	eval('window.open(\'../read_im.php?im='+id+'&w='+width+'&h='+height+'\', \'ShowWin\', \'scrollbars=no, status=no, width='+width+', height='+height+', resizable=no\')');
}