javascript Function相關

 function Block(func, tag) {    var _r_function = /^function\b\s*([\$\S]*)\s*\(/;    var _r_codebody = /[^{]*\{([\d\D]*)\}$/;    var _r_params = /[^\(]*\(([^\)]*)\)[\d\D]*/;    tag = (tag || 'body').toLowerCase();    with (func.toString()) {    return (tag == 'body') ? replace(_r_codebody, '$1').replace(/^\s*|\s*$/g, '')    : (tag == 'param') ? ((tag=replace(_r_params, '$1')) ? tag.split(/[,\s]+/) : [])    : (tag == 'name') ? match(_r_function)[1]    : (tag == 'scope') ? '[function (' +arguments.callee(func, 'param')+ ') {\n' +arguments.callee(func, 'body')+ '\n}][0]'    : (tag == 'anonymous') ? Function.apply(this, arguments.callee(func, 'param').concat(arguments.callee(func, 'body')))    : 'Block() with bad arguments.';    }    };    var a = function () {    alert(3333)    };    alert(Block(a, 'anonymous'))

取得函數名

var fname = function(f){    return f.name;}if(!("name" in Function.prototype)){    fname = function(f){          return String(f).match(/^function\s*([^)]*)\(/)[1];    }}