$.preload.gap = 10;
$.preload(["mp_e2_e1","mp_e2_e2","mp_e2_e3","mp_e2_e4","mp_e2_e5",
	"mp_e2_e1_e1","mp_e2_e1_e2","mp_e2_e1_e3","mp_e2_e1_e4","mp_e2_e1_e5","mp_e2_e1_e6",
	"mp_e3_e1","mp_e3_e2","mp_e3_e3","mp_e3_e4","mp_e3_e5","mp_e6_e1","mp_e6_e2"], {
	base:"imgs/", ext:".gif"});
function hideMS(){$("#ms_i").slideUp("slow");}
function showHideMS(){
	if ($("#ms_i").is(":hidden")) {
		$("#ms_i").slideDown("slow", function(){$("#tu").focus()});
	} else
		$("#ms_i").slideUp("slow");
}
function loginS(){document.getElementById("frmS").submit();}
function esCorreoElectronico(campo){  
	var obj = document.getElementById(campo).value;
	var b=/^[^@\s]+@[^@\.\s]+(\.[^@\.\s]+)+$/  
	return b.test(obj)  
}
function esVacio(campo){
	var obj = document.getElementById(campo).value;
	if (obj.length ==0) return true; else return false;
}