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

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 ......

JavaScriptÖеÄÃæÏò¶ÔÏó Àà


<!--
/* Font Definitions */
@font-face
{font-family:ËÎÌå;
panose-1:2 1 6 0 3 1 1 1 1 1;
mso-font-alt:SimSun;
mso-font-charset:134;
mso-generic-font-family:auto;
mso-font-pitch:variable;
mso-font-signature:3 135135232 16 0 262145 0;}
@font-face
{font-family:"Cambria Mat ......

javaScriptÈçºÎ¼àÌýä¯ÀÀÆ÷¹Ø±Õʼþ

×î½üд¶«Î÷µÄʱºò·¢ÏÖÐèÒª¶Ôä¯ÀÀÆ÷µÄ¹Ø±Õ½øÐмàÌý,µ±Óû§¹Ø±ÕµÄʱºòÐèÒªµ÷ÓÃsession.invalid();Çå¿ÕsessionÐÅÏ¢,µ«ÊÇ×Ðϸһ²éÊֲᷢÏÖÎÞÂÛÊÇbody»¹ÊÇwindow¶¼Ã»ÓÐoncloseʼþ,Ö®ºóonload,onunload,beforeunloadÈý¸öʼþ
È»¶øÈý¸öʱ¼äÎÞÂÛÊÇÄĸö¶¼ÎÞ·¨µ¥¶À½â¾öµ¥¶À¼àÌýä¯ÀÀÆ÷¹Ø±ÕµÄʼþ,ÒòΪÔÚä¯ÀÀÆ÷Õý³£ÔËÐÐʱÏȼÓÔØµÄÊÇbe ......

AJAXÈëÃÅÖ®ÉîÈëÀí½âJavaScriptÖеĺ¯Êý

º¯ÊýÊǽøÐÐÄ£¿é»¯³ÌÐòÉè¼ÆµÄ»ù´¡£¬±àд¸´ÔÓµÄAjaxÓ¦ÓóÌÐò£¬±ØÐë¶Ôº¯ÊýÓиüÉîÈëµÄÁ˽⡣JavaScriptÖеĺ¯Êý²»Í¬ÓÚÆäËûµÄÓïÑÔ£¬Ã¿¸öº¯Êý¶¼ÊÇ
×÷Ϊһ¸ö¶ÔÏó±»Î¬»¤ºÍÔËÐеġ£Í¨¹ýº¯Êý¶ÔÏóµÄÐÔÖÊ£¬¿ÉÒԺܷ½±ãµÄ½«Ò»¸öº¯Êý¸³Öµ¸øÒ»¸ö±äÁ¿»òÕß½«º¯Êý×÷Ϊ²ÎÊý´«µÝ¡£ÔÚ¼ÌÐø½²Êö֮ǰ£¬ÏÈ¿´Ò»Ïº¯ÊýµÄʹÓÃÓï
·¨£º
function func1(& ......

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 ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ