[转载]通过jQuery的attr修改onclick

var js = "alert('B:' + this.id); return false;";
// creates a function from the "js" string
var newclick = eval("(function(){"+js+"});");
// clears onclick then sets click
$("#anchor").attr('onclick', '').click(newclick);

转自：http://www.cnblogs.com/dudu/archive/2010/02/27/1674690.html