JavaScript ÅжÏÎļþÊÇ·ñ´æÔÚ
1. ¿Í»§¶Ë //Ö÷ÒªÕë¶Ô±¾µØIEä¯ÀÀÆ÷·ÃÎÊ
<script
language="javascript">
function FileExist()
{
var sfso=new
ActiveXObject("Scripting.FileSystemObject");
var fPath="[The path of the
file]";
if(sfso.FileExists(fPath))
{
alert("Exist");
}
else
{
alert("Doesn't
exist");
}
}
</script>
2.
·þÎñÆ÷¶Ë//Ô¶³Ìä¯ÀÀÆ÷·ÃÎʺͱ¾µØFirefox·ÃÎÊ
<script
language="javascript">
function FileExist()
{
var xmlhttp=new
ActiveXObject("Microsoft.XMLHTTP");
xmlhttp.open("GET",FileURL,false);
xmlhttp.send();
if(xmlhttp.readyState==4)
{
if(xmlhttp.status==200)
alert("Exist");
else if(xmlhttp.status==404) alert("Doesn't
exist");
else alert("Don't know");
}
}
</script>
»òÕß
<script language="JavaScript">
function fileExists(file)
{
if(window.XMLHttpRequest)
{
xmlhttp=new XMLHttpRequest();
if(xmlhttp.overrideMimeType)
{
xmlhttp.overrideMimeType('text/xml');
}
}
else if(window.ActiveXObject)
{
try
{
xmlhttp=new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e)
 
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/* 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:"\@ËÎÌå" ......
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<script language="javascript">
//ÓÃÕýÔòÌæ»»½«XÌæ»»³Éy
var s="daxdasx";//Ô×Ö·û´®
var k="x";//±»Ìæ»»µÄ×Ö¶Î
var re = new RegExp(k,"g");
alert("Ìæ»»Ç°×Ö·û´®Îª£º"+s);
s = s.replace(re,"y");
alert("Ìæ»»ºó×Ö·û´®Îª£º"+s);
</script> ......
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JavaScript
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Óï·¨ 1
re = /
pattern
/
[flags
]
Óï·¨ 2
re = new RegExp("
pattern
",
["
flags
"
])
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re
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Pattern
±ØÑ¡ÏҪʹÓõÄÕýÔò±í´ïʽģʽ¡£Èç¹ûʹÓÃÓï·¨ 1
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