Javascript: setTimeout()使用及 setInterval()使用__Java

Evaluates an expression after a specified number of milliseconds has elapsed.

(在指定時間過後執行指定的運算式)

Syntax: iTimerID = window.setTimeout(vCode, iMilliSeconds [, sLanguage])

Parameters

vCode	Required. Variant that specifies the function pointer or string that indicates the code to be executed when the specified interval has elapsed.
iMilliSeconds	Required. Integer that specifies the number of milliseconds.
sLanguage	Optional. String that specifies one of the following values: JScript Language is JScript. VBScript Language is VBScript. JavaScript Language is JavaScript.

Return Value

Integer. Returns an identifier that cancels the evaluation with the clearTimeout method.

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setTimeout( alert("3秒種過去了"), 3000);//調用一個函數,允許帶常量參數
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  <mce:script language="Javascript"><!-- //by zuoyang var x = 1; var y = 2; var z = 3; var sum; function Plus(a, b) { var z = 0; var i = 0; for (i = 0; i < arguments.length; i++) { z += arguments[i]; } setTimeout( function() {alert(z);}, 6000); //可以帶變數參數的setTimeout調用形式 return z; } setTimeout( function(){ sum = Plus(x, y, z); }, 3000);/*除了可以帶變數參數還可以擷取傳回值的setTimeout調用形式*/ // --></mce:script>

setInterval()的用法和setTimeout()是一樣的:

iTimerID = window.setInterval(vCode, iMilliSeconds [, sLanguage])

不同的是setTimeout()是一次性作用,而setInterval()是每隔iMilliSeconds 就執行一次vCode.( Evaluates an expression each time a specified number of milliseconds has elapsed)