jscript - Ping error return always equals 0 -


having trouble getting code work. can run script (with changes) in vbscript , runs fine. cant version return ping error return value other 0. appreciated.

this scanning list of remote machines checkboxes , returning checked values. want run ping verify remote machine there before continuing. error return of 0 queries useless.

function statuschk3(){ var checkedvalue = null;  var inputelements = document.getelementsbyname("comp"); for(var i=0; inputelements[i]; ++i){   if(inputelements[i].checked)   {checkedvalue = inputelements[i].value; var wshshell = new activexobject("wscript.shell"); var status = wshshell.run ("ping -n 1 -a"  + checkedvalue + ",0 ,true");     if(status == 0)     {   var fso = new activexobject("scripting.filesystemobject");         var s = fso.opentextfile("c:/script/testfile1.txt", 8, true);         s.writeline(checkedvalue + " turned off or off domain");         s.close();     }      else`

here's function use test connectivity. use vbscript version of this, rewrote in javascript.

function reachable(strcomputer)  {     var wmiquery = "select * win32_pingstatus address = '" + strcomputer + "'";     var objwmiservice = getobject("winmgmts://./root/cimv2");     var colitems = objwmiservice.execquery(wmiquery);     var enumitems = new enumerator(colitems)     (; !enumitems.atend(); enumitems.movenext())     {         var objstatus = enumitems.item();         if ((objstatus.statuscode == null) || (objstatus.statuscode != 0))         {             return false //if computer unreachable, return false         }         else         {             return true //'if computer reachable, return true         }     } }

usage:

vbscript:
if reachable(strcomputer) msgbox "online" else msgbox "offline"

javascript:
if (reachable(strcomputer)) { alert("online") } else { alert("offline") }

edit:

if you'd adjust timeout of this, can add following line:

var wmiquery = "select * win32_pingstatus address = '" + strcomputer + "' , timeout=500";

where 500 500 milliseconds.

here's more on win32_pingstatus class, says default timeout 1000 milliseconds.

another edit address original question:

it looks have syntax issues original code:

var status = wshshell.run ("ping -n 1 -a"  + checkedvalue + ",0 ,true");

needs be

var status = wshshell.run ("ping -n 1 -a "  + checkedvalue, 0,true);

notice location of space after a , quotation marks after checkedvalue

also, logic backwards. if(status==0) device online.


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