CODEWITHSUNDEEP
htmlajaxformswebforms
daniilcul8r
daniilcul8r

Reputation: 23

AJAX-based auto-completion script for filling in an HTML <form>

So, I have this HTML-form that I want to fill in with the names of the US states. I have all of 50 of them (Alabama to Wyoming) stored in the following format:

<?xml version="1.0"?>
<states xml:lang="EN">
<item>
<label>Alabama</label>
<value>AL</value>
</item>
<item>
<label>Alaska</label>
<value>AK</value>
</item>
...

When the user starts typing "Ne", the script would list in a pop-box the suggestions Nebraska, Nevada, New Hampshire, New Jersey, etc. As the user continues typing: "New", the list of suggestions would narrow down to New Hampshire, New Jersey, New Mexico, New York, until there is only one state left. What AJAX should I use to get this thing working?

Upvotes: 1

Views: 43

Answers (1)

Abhishek Pachal
Abhishek Pachal

Reputation: 554

function ajaxFunction(str) {
  if (str.length==0) { 
    document.getElementById("search").innerHTML="";
    document.getElementById("search").style.border="0px";
    return;
  }
  var input=document.getElementById('text1').value;
  var ajaxRequest = new XMLHttpRequest();
  ajaxRequest.onreadystatechange = function() {
    if (ajaxRequest.readyState==4 && ajaxRequest.status==200) {
        var res=ajaxRequest.responseXML;
        var states=res.getElementsByTagName("states");
        var elem=states[0];
        var items=res.getElementsByTagName("item");
        document.getElementById("search").innerHTML="";
    for(var i=0;i<items.length;i++){

        var item=items[i].getElementsByTagName("label");
        var state=item[0].innerHTML;
        var len=str.length;
        var match=state.substr(0,len);
        if(match.toUpperCase()==input.toUpperCase()){
            var val=items[i].getElementsByTagName("value");
            var value=val[0].innerHTML;
            var e = document.createElement('span');
            e.innerHTML = state+"("+value+")&nbsp;&nbsp;";
            document.getElementById("search").appendChild(e.firstChild);
        }
     }

      document.getElementById("search").style.border="1px solid #A5ACB2";
    }
  }
  ajaxRequest.open("GET","USA_States.xml",true);
  ajaxRequest.send();
}

Upvotes: 2

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