验证空格的正则表达式

function check(){    var s = "  I     love                 you                                     9                                    6                 66";    var re = /([ ]{4,})/g;    var r = s.replace(re," SupperSdr");    alert(r);}check();

将s中出现的空格全部用SupperSdr这个字符串代替