[vadim5june]

function someFunc(somevar) {
	somevar = typeof(somevar) != 'undefined' ? somevar : 100;

	$.ajax({
		url: 'index.php',
		type: 'post',
		data: 'somevar=' + somevar,
		dataType: 'json',
		success: function(json) {
				// smth
			//}	
		}
	});
}
var somevar='somevar';
var str=someFunc.toString();
var pp='var pars='+str.split('$.ajax(')[1].split('})')[0]+'}';eval(pp);for(var u in pars)alert(u+'='+pars[u]);