javascript 实现的定时器

  1 GLOBAL.namespace("Timer");
  2 GLOBAL.Timer._callTimeOutMethod = function(method, parameters,scope) {
  3     return function() {
  4         if (typeof (parameters) == "undefined" ||typeof (parameters) == "null") {
  5             if(typeof(scope) == "undefined"||typeof(scope) == "null")
  6             {
  7                method();
  8             }else
  9             {
 10               method.apply(scope);
 11             }
 12         } else {
 13             if(typeof(scope) == "undefined"||typeof(scope) == "null")
 14             {
 15             method(parameters);
 16             }else
 17             {
 18               method.apply(scope,parameters);
 19             }
 20         }
 21     }
 22 };
 23 GLOBAL.Timer._callIntervalMethod = function(method, parameters, milliseconds,scope) {
 24     return function() {
 25         if (typeof (parameters) == "null") {
 26             if(typeof(scope) == "undefined"||typeof(scope) == "null")
 27             {
 28             method();}
 29             else
 30             {
 31               method.apply(scope);
 32             }
 33         } else {
 34         if(typeof(scope) == "undefined"||typeof(scope) == "null")
 35             {
 36             method(parameters);}
 37             else
 38             {
 39               method.apply(scope,parameters);
 40             }
 41         }
 42         window.setTimeout(arguments.callee, milliseconds);
 43     }
 44 };
 45 /**
 46  * 调用函数 参数method 需要以数组作为参数
 47  */
 48 GLOBAL.Timer.setTimeout = function(method, parameters, milliseconds,scope) {
 49     if (typeof (parameters) == "null") {
 50         if(typeof(scope) == "undefined")
 51         {
 52         return window.setTimeout(GLOBAL.Timer._callTimeOutMethod(method),
 53                 milliseconds);
 54                 }else
 55                 {
 56                   return window.setTimeout(GLOBAL.Timer._callTimeOutMethod(method,null,scope),
 57                 milliseconds);
 58                 }
 59     } else {
 60         if(typeof(scope) == "undefined")
 61         {
 62         return window.setTimeout(GLOBAL.Timer._callTimeOutMethod(method,
 63                 parameters), milliseconds);
 64                 }else
 65                 {
 66                 return window.setTimeout(GLOBAL.Timer._callTimeOutMethod(method,
 67                 parameters,scope), milliseconds);
 68                 }
 69     }
 70 };
 71 
 72 GLOBAL.Timer.clearTimeout = function(timerID) {
 73     return window.clearTimeout(timerID);
 74 };
 75 GLOBAL.Timer.clearInterval = function(timerIntervalID) {
 76     return GLOBAL.Timer.clearTimeout(timerIntervalID);
 77 };
 78 /**
 79  * 安全的间隔执行 以setTimeout实现
 80  */
 81 GLOBAL.Timer.setInterval = function(method, paramters, milliseconds,scope) {
 82     if (typeof (parameters) == "null") {
 83         if(typeof (scope) == "undefined")
 84         {
 85           return window.setTimeout(GLOBAL.Timer._callIntervalMethod(method, null,
 86                 milliseconds), milliseconds);
 87         }else
 88         {
 89         return window.setTimeout(GLOBAL.Timer._callIntervalMethod(method, null,
 90                 milliseconds,scope), milliseconds);
 91                 }
 92     } else {
 93         if(typeof (scope) == "undefined")
 94         {
 95         return window.setTimeout(GLOBAL.Timer._callIntervalMethod(method,
 96                 parameters, milliseconds), milliseconds);
 97                 }else
 98                 {
 99                 return window.setTimeout(GLOBAL.Timer._callIntervalMethod(method, null,
100                 milliseconds,scope), milliseconds);
101                 }
102     }
103 };