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 ......
// 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 ......
JavascriptÖÐfunction¼´ÎªÀ࣬ÔÚfunctionÄÚ²¿ÓÃthisÉèÖÃÀàµÄpublic³ÉÔ±±äÁ¿Óë·½·¨£¬ÀýÈ磺
function myclass(name){
¡¡¡¡¡¡¡¡var str = "private string";¡¡¡¡¡¡¡¡//private field
¡¡¡¡¡¡¡¡function privatefn(){¡¡¡¡¡¡¡¡¡¡¡¡//private method¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡alert(str);
¡¡¡¡¡¡¡¡};
¡¡¡¡¡¡¡¡this.name = name;
¡¡ ......
ÔÚ¿´ÁËW3CµÄ¹ØÓÚECMScriptµÄ¶ÔÏ󼰼̳кó£¬ÏÈÊÇÍê³Ḛ́³ÔÉßµÄʵÏÖ¡£×î½üÓÖ³é¿ÕʵÏÖÁË϶íÂÞ˹·½¿é¡£¶ÔÓÚ¶íÂÞ˹·½¿éÖØÒªµÄ²»ÊÇÓÎÏ·±¾Éí£¬¶øÊÇÔÚÕâ¸ö¹ý³ÌÖжÔÓÚjavascript¼Ì³ÐµÄʹÓá£
µ±È»ÔÚһЩ¶ÔÏóµÄ»®·Ö¼°Ê¹Óùý³Ì»¹´æÔÚ覴ã¬Ëã·¨Ò²²»Ëã×îÓÅ£¬·¢²¼³öÔ´ÂëÖ»ÊÇÏë×ö¸ö½»Á÷¡£ÒÔϾÍÌṩԴ´úÂ빩´ó¼Ò²Î¿¼£¬Ò²Îª×Ô¼º×ö¸ö±¸·Ý¡£ ......