My Script to call ajax

<script language=javascript>

function search_func(value)

{

    $.ajax({

       type: GET,

       url: sample.php,

       data: {'search_keyword' : value},

       dataType: text,

       success: function(msg){

                   //Receiving the result of search here

       }

    });

}

</script>

HTML

   <input type=text name=sample_search id=sample_search onkeyup=search_func(this.value);>

Question: while onkeyup I am using ajax to fetch the result. Once ajax result delay increases problem occurs for me.

For Example
While typing t keyword I receive ajax result and while typing te I receive ajax result
when ajax time delay between two keyup sometime makes a serious issue.

When I type te fastly. ajax search for t keyword come late, when compare to te. I don't know how to handle this type of cases.

Result
While typing te keyword fastly due to ajax delays. result for t keyword comes.

I believe I had explained up to reader knowledge.