Javascript checks whether the file has instance code and javascript instances.

Javascript checks whether the file has instance code and javascript instances.

Javascript checks whether a file exists

1. Client

<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. Server Side

<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>

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