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
scrollHeight: »ñÈ¡¶ÔÏóµÄ¹ö¶¯¸ß¶È¡£
scrollLeft:ÉèÖûò»ñȡλÓÚ¶ÔÏó×ó±ß½çºÍ´°¿ÚÖÐĿǰ¿É¼ûÄÚÈݵÄ×î×ó¶ËÖ®¼äµÄ¾àÀë
scrollTop:ÉèÖûò»ñȡλÓÚ¶ÔÏó×î¶¥¶ËºÍ´°¿ÚÖпɼûÄÚÈݵÄ×î¶¥¶ËÖ®¼äµÄ¾àÀë
scrollWidth:»ñÈ¡¶ÔÏóµÄ¹ö¶¯¿í¶È
offsetHeight:»ñÈ¡¶ÔÏóÏà¶ÔÓÚ°æÃæ»òÓɸ¸×ø±ê offsetParent ÊôÐÔÖ¸¶¨µÄ¸¸×ø±êµÄ¸ß¶È
offsetL ......
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
......
×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 ......
getAttribute()·½·¨
¡ñÒ»·ÝÎĵµ¾ÍÊÇÒ»¿Ã½ÚµãÊ÷¡£
¡ñ½Úµã·ÖΪ²»Í¬µÄÀàÐÍ£ºÔªËؽڵ㡢ÊôÐÔ½ÚµãºÍÎı¾½ÚµãµÈ¡£
¡ñgetElementById()·½·¨½«·µ»ØÒ»¸ö¶ÔÏ󣬸öÔÏó¶ÔÓ¦×ÅÎĵµÀïµÄÒ»¸öÌØ¶¨µÄÔªËØ½Úµã¡£
¡ñgetElementsByTagName()·½·¨½«·µ»ØÒ»¸ö¶ÔÏóÊý×飬ËüÃÇ·Ö±ð¶ÔÓ¦×ÅÎĵµÀïµÄÒ»¸ ......
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
4. oncopy="return false;" oncut=" ......