var San = {
	$ : function(e) {
		if (document.getElementById(e))
			return document.getElementById(e);
		else
			return null;
	},
	
	getFormValues : function(oForm) {
		oForm = San.$(oForm);
		if (oForm) {
		    var aParams = new Array();
		    for (var i=0 ; i < oForm.elements.length; i++) {
				if (oForm.elements[i].type == 'radio' && oForm.elements[i].checked == false)
					continue;
		        var sParam = oForm.elements[i].name;
		        sParam += "=";
		        sParam += San.URLEncode(oForm.elements[i].value);
		        aParams.push(sParam);
		    }
		    return aParams.join("&");
		} else {
			alert("Formulário não existe");
			return null;
		}
	},

	URLEncode : function(plaintext) {
		var SAFECHARS = "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz"+"-_.!~*'()";
		var HEX = "0123456789ABCDEF";
		var encoded = "";
		for (var i = 0; i < plaintext.length; i++ ) {
			var ch = plaintext.charAt(i);
		    if (ch == " ") {
			    encoded += "+";
			} else if (SAFECHARS.indexOf(ch) != -1) {
			    encoded += ch;
			} else {
			    var charCode = ch.charCodeAt(0);
				if (charCode > 255) {
				    alert( "Codificador de caracteres ('" 
	                        + ch 
	                        + "') nao foi possivel codificar usando standard URL encoding.\n" +
					          "(URL encoding suporta apenas caracteres de 8-bits.)\n" +
							  "Espacos serao substituidos por (+)." );
					encoded += "+";
				} else {
					encoded += "%";
					encoded += HEX.charAt((charCode >> 4) & 0xF);
					encoded += HEX.charAt(charCode & 0xF);
				}
			}
		}
		return encoded;
	}
}