function isExplorer(){
	return (navigator.appName == "Microsoft Internet Explorer");
}

function LTrim(str){
	var whitespace = new String(" \t\n\r ");
	var s = new String(str);
	if (whitespace.indexOf(s.charAt(0)) != -1) {
	    var j=0, i = s.length;
	    while (j < i && whitespace.indexOf(s.charAt(j)) != -1)
		j++;
	    s = s.substring(j, i);
	}
	return s;
}

function RTrim(str){
	var whitespace = new String(" \t\n\r ");
	var s = new String(str);
	if (whitespace.indexOf(s.charAt(s.length-1)) != -1) {
	    var i = s.length - 1;       // Get length of string
	    while (i >= 0 && whitespace.indexOf(s.charAt(i)) != -1)
		i--;
	    s = s.substring(0, i+1);
	}
	return s;
}

function Trim(str){
	return RTrim(LTrim(str));
}

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 desabilitarObjeto(idObjeto) {
	
	var obj = document.getElementById(idObjeto);
	if (obj!=null){
		if ( (obj.type == "input") || (obj.type == "password") || (obj.type == "radio") || (obj.type == "checkbox") || (obj.type == "select-one") || (obj.type == "select-multiple") )
			obj.disabled = true;
	}
	
}