<!--
function maxCaracteres(campo, nCaracteres){
	if(campo.value.length >= nCaracteres -1){
		campo.value = campo.value.substring(0, nCaracteres -2);
		alert("Atención:\nPermitidos máximo " + nCaracteres + " caracteres.\t");
	}
}
function displayCtrl(ctrl){
	if ( document.getElementById ) {
		var target = document.getElementById( ctrl );
		if ( target != null ) {
			target.style.display = ( target.style.display != "none" ) ? "none" : "";
		}
	}
}
function Left(str, n){
	if (n <= 0)
	    return "";
	else if (n > String(str).length)
	    return str;
	else
	    return String(str).substring(0,n);
}
function Right(str, n){
    if (n <= 0)
       return "";
    else if (n > String(str).length)
       return str;
    else {
       var iLen = String(str).length;
       return String(str).substring(iLen, iLen - n);
    }
}
function LTrim(sString){
	while (sString.substring(0,1) == ' ')
	{
		sString = sString.substring(1, sString.length);
	}
	return sString;
}
function RTrim(sString){
	while (sString.substring(sString.length-1, sString.length) == ' ')
	{
		sString = sString.substring(0,sString.length-1);
	}
	return sString;
}
function Trim(sString){
	sString = LTrim(sString);
	sString = RTrim(sString);
	return sString;
}
function IsEmail(str){
	return (str.match(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,4})+$/));
}
//-->