javascript: remove file extension

gistfile1

function remove_file_extension(name, extensions) {
	var my_extensions = extensions || ["jpg","gif","png","psd","eps","indd","INDL","ai","txt","pdf"];
	var reg_string = "\.(" + my_extensions.join("|") + ")$";	
	var my_reg = new RegExp( reg_string, "i" );
	name = name.replace(my_reg, '');
	return name;
};