JS how to get the full path of the file control

<script type= "Text/javascript" >


//fx Get File path method


function Readfilefirefox (filebrowser) {


try {


Netscape.security.PrivilegeManager.enablePrivilege ("Universalxpconnect");


}


catch (e) {


alert (' Cannot access local files due to browser security settings. To overcome this, follow these steps: (1) in the Address bar, enter "About:config";(2) Right-click and select new->boolean; (3) Enter the name "Signed.applets.codebase_principal_support" (without quotes) as a new preference; (4) Click OK and try reloading the file ');


return;


}


var filename=filebrowser.value; This step will get the full client path. The following is too complex to judge, and the following get IE is also very complex.


var file = components.classes["@mozilla. Org/file/local;1"]


. CreateInstance (Components.interfaces.nsILocalFile);


try {


//back slashes for Windows


File.initwithpath (Filename.replace (///g, ""));


}


catch (e) {


if (e.result!=components.results.ns_error_file_unrecognized_path) throw e;


alert ("File" + fileName + "' cannot is loaded:relative paths are not allowed. Please provide a absolute path to this file. ");


return;


}


if (file.exists () = False) {


alert ("File" + fileName + "' not found.");


return;


}


return file.path;


}


//Access paths based on different browsers


function Getvl () {


//Judge Browser


var Sys = {};


var ua = Navigator.userAgent.toLowerCase ();


var s;


(s = Ua.match (/msie) ([D.] +)/)) ? sys.ie = s[1]:


(s = Ua.match (/firefox/) ([D.] +)/)) ? Sys.firefox = s[1]:


(s = Ua.match (/chrome/) ([D.] +)/)) ? Sys.chrome = s[1]:


(s = Ua.match (/opera) ( [D.] +)/)) ? Sys.opera = s[1]:


(s = Ua.match (/version/) ([D.] +). *safari/)? Sys.safari = S[1]: 0;


var file_url= "";


if (sys.ie<= "6.0") {


//ie5.5,ie6.0


File_url = document.getElementById ("file"). Value;


}else if (sys.ie>= "7.0") {


//IE7,IE8


var file = document.getElementById ("file");


File.select ();


File_url = Document.selection.createRange (). text;


}else if (sys.firefox) {


//fx


//file_url = document.getElementById ("file"). Files[0].getasdataurl ()//The path obtained is an encrypted string recognized by FF


File_url = Readfilefirefox (document.getElementById ("file"));


}


//alert (File_url);


document.getElementById ("text"). Innerhtml= "Get the complete path to the file domain is:" +file_url;


}


</script>


<h1>js Gets the full path to the file domain, compatible with different browsers </h1>


<div id= "text" style= "color: #f00;" ></div>


<input type= "file" id= "file"/>


<input name= "type=" button "value=" gets "onclick=" GETVL (); >