Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

¹ØÓÚjavascriptÅжÏÎļþ´óС

<script type="text/javascript">  
function getFileSize(filePath) {  
   var image=new Image();  
   image.dynsrc=filePath;  
   alert(image.fileSize);  
}  
</script>  
<body>  
<INPUT TYPE="file" NAME="file" SIZE="30" onchange="getFileSize(this.value)">  
</body>


Ïà¹ØÎĵµ£º

JavascriptÖÐ×î³£ÓõÄ55¸ö¾­µä¼¼ÇÉ

  JavascriptÖÐ×î³£ÓõÄ55¸ö¾­µä¼¼ÇÉ
1. oncontextmenu="window.event.returnValue=false" ½«³¹µ×ÆÁ±ÎÊó±êÓÒ¼ü
<table border oncontextmenu=return(false)><td>no</table> ¿ÉÓÃÓÚTable
2. <body onselectstart="return false"> È¡Ïûѡȡ¡¢·ÀÖ¹¸´ÖÆ
3. onpaste="return false" ²»×¼Õ³Ìù ......

ÉîÈëÀí½âJavascript±Õ°ü(closure)

×î½üÔÚÍøÉϲéÔÄÁ˲»ÉÙJavascript±Õ°ü(closure)Ïà¹ØµÄ×ÊÁÏ£¬Ð´µÄ´ó¶àÊǷdz£µÄѧÊõºÍרҵ¡£¶ÔÓÚ³õѧÕßÀ´Ëµ±ð˵Àí½â±Õ°üÁË£¬¾ÍÁ¬ÎÄ×ÖÐðÊö¶¼ºÜÄÑ¿´¶®¡£×«Ð´´ËÎĵÄÄ¿µÄ¾ÍÊÇÓÃ×îͨË×µÄÎÄ×Ö½Ò¿ªJavascript±Õ°üµÄÕæÊµÃæÄ¿¡£
Ò»¡¢Ê²Ã´ÊDZհü£¿
“¹Ù·½”µÄ½âÊÍÊÇ£ºËùν“±Õ°ü”£¬Ö¸µÄÊÇÒ»¸öÓµÓÐÐí¶à±äÁ¿ºÍ°ó¶¨Á ......

javascriptÊý×éΨһ»¯ÊµÏÖ·½Ê½

ʵÏÖ·½Ê½
ÕâÀï¸ø³ö2ÖÐʵÏÖ·½Ê½¡£Ò»ÖÖÊÇ´ó¼ÒÓ¦¸Ã¶¼ÖªµÀµÄindexOf¼ì²âµÄ·½Ê½£¬ÁíÒ»ÖÖÊǽáºÏlastIndexOfºÍspliceʵÏÖ·½Ê½¡£
//Ê×ÏȸøArray¶ÔÏóÔ­ÐÍÉÏÌí¼ÓindexOfºÍlastIndexOf·½·¨.(Èç¹ûûÓеϰ)
if(!Array.prototype.indexOf){
Array.prototype.indexOf = function(element, index){
var length = this.len ......

JavaScript¶ÔÏóÄ£ÐÍ Ö´ÐÐÄ£ÐÍ

Êý¾ÝÀàÐÍ
»ù±¾Êý¾ÝÀàÐÍ
»ù±¾Êý¾ÝÀàÐÍÊÇJSÓïÑÔ×îµ×²ãµÄʵÏÖ¡£
¼òµ¥ÊýÖµÀàÐÍ: ÓÐUndefined, Null, Boolean, NumberºÍString¡£×¢Ò⣬ÃèÊöÖеÄÓ¢Îĵ¥´ÊÔÚÕâÀï½öÖ¸Êý¾ÝÀàÐ͵ÄÃû³Æ£¬²¢²»ÌØÖ¸JSµÄÈ«¾Ö¶ÔÏóN an, Boolean, Number, StringµÈ£¬ËüÃÇÔÚ¸ÅÄîÉϵÄÇø±ðÊDZȽϴóµÄ¡£
¶ÔÏó: Ò»¸öÎÞÐòÊôÐԵļ¯ºÏ£¬ÕâЩÊôÐÔµÄֵΪ¼òµ¥ÊýÖµÀ ......

javascriptË«ÒýºÅתÒå

http://www.cnblogs.com/yzx99/archive/2008/08/08/1263416.html
µ¥ÒýºÅ,Ë«ÒýºÅ,javascript,HTML,תÒå×Ö·û
ÔÚÒ»¸öÍøÒ³Öеİ´Å¥£¬Ð´onclickʼþµÄ´¦Àí´úÂ룬²»Ð¡ÐÄд³ÉÈçÏ£º
<input value="Test" type="button" onclick="alert(""OK"");" />
IEÌáʾ³ö´íºó£¬ÔÙÂþ²»¾­ÐĵظÄΪ£º
<input value="Test" type="bu ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ