Loop php with javascript cannot get the right order of result -

for(var i=0; i<participantnum; i++){     studentid = $('#txtid'+(i+1)).val();     alert(studentid);     //my php function call it's work request(php,paramiter,cb)     request("http://localhost/lastorientation/2_registervalidate.php","studentid="+studentid,validateid); } 

i value each textbox loop , call php script validate student id

but result come out randomly it's not arrange order increment loop

,by way result come out. know because ajax request can advise

me how result order in way loop does.

thank in advance

sorry language.

it looks request method doing ajax request serve request, if yes ajax requests asynchronous in nature means cannot predict when callback executed or request completed soon. depends on network speed server speed on serving request.

a possible solution queue requests like

function x(i, limit){     if(i >= limit){         return;     }     studentid = $('#txtid'+(i+1)).val();     alert(studentid);     //my php function call it's work request(php,paramiter,cb)     request("http://localhost/lastorientation/2_registervalidate.php","studentid="+studentid,validateid).complete(function(){         x(i + 1, participantnum)     }); }  x(0, participantnum);  function request(){     return $.ajax(...) }