javascriptÖеÄwith
with(document)
{
write ("test");
write
("dsasfda");
}
ÉÏÃæÊÇÓÃÁËwith
Èç¹û²»Óõϰ¾ÍÒªÕâÑùдÁË
document.write ("test")
document.write ("dsasfda");
Ê¡µôÁ˲»ÉٵĴúÂëÓ´
Ïà¹ØÎĵµ£º
Êý×éÓÐËÄÖÖ¶¨ÒåµÄ·½Ê½
ʹÓù¹Ô캯Êý£º
var a = new Array();
var b = new Array(8);
var c =
new Array("first", "second", "third");
»òÕßÊý×éÖ±½ÓÁ¿£º
var d = ["first",
"second", "third"];
ÊôÐÔ
ArrayÖ»ÓÐÒ»¸öÊôÐÔ£¬¾ÍÊÇlength£¬length±íʾµ ......
ÈÏÇåJavaScriptºÍJAVAÈ«¾Ö±äÁ¿ºÍ¾Ö²¿±äÁ¿µÄ×÷ÓÃÓò
2010Äê2ÔÂ28ÈÕ george ·¢±íÆÀÂÛ ÔĶÁÆÀÂÛ
ͨ¹ýÌÔ±¦ÃæÊÔÌâÀ´ÈÏÇåJavaScriptºÍJAVAÈ«¾Ö±äÁ¿ºÍ¾Ö²¿±äÁ¿µÄ×÷ÓÃÓò
×¢ÒâÁ½ÕßÊÇÓÐÑÏÖØÇø±ðµÄ£¡
var a = 100;
function testResult(){
var b = 2 * a;
var a = 200;
var c = a / 2 ......
// ѧϰҪÏ뿽±´ÄÇô¿ì¾ÍºÃÁË
//
// JavaScript µÄ¼Ì³ÐÊÇ»ùÓÚ prototype µÄ£¬Ã¿¸ö¶ÔÏóµÄ prototype ÊDZ£´æÔÚ¶ÔÏóµÄ __proto__ ÊôÐÔÖеģ¬Õâ¸öÊôÐÔÊÇÄÚ²¿(internal)µÄÊôÐÔ( ¹ßÀýÊÇÄÚ²¿µÄ»òÕßÒþ²ØµÄÊôÐÔÒÔ _ ¿ªÍ·)
// A prototype-based language has the notion of a prototypical object, an object used as a template ......
1. ijЩ»ùÀàÈç¹û²»Ö±½ÓʹÓÃ,¶ø½ö½öÖ»ÊÇÓÃÓÚ¸ø×ÓÀàÌṩͨÓõĺ¯Êý,ÕâÖÖÇé¿öÏÂ,»ùÀà±»¿´×÷³éÏóÀà.
2. ÔÚ javascript µÄÀàÖÐËùÓеķ½·¨ºÍÊôÐÔ¶¼ÊÇ"¹«ÓõÄ".
3. javascript Öеļ̳в¢²»ÊÇÃ÷È·¹æ¶¨µÄ,¶øÊÇͨ¹ýÄ£·ÂÀ´ÊµÏÖµÄ.ÓÐÒÔÏ·½·¨:
(1). ¶ÔÏóð³ä
function A(sColor){
this.color = sColor;
this.showColo ......