[Stack Overflow #49040586] SCRIPT #1 and SCRIPT #2

The original JS scripts as mentioned on Stack Overflow <https://stackoverflow.com/q/49040586/9217760>.

[SCRIPT #1]
/* Auto Suggestion */
/*function insertAfter(newNode, referenceNode) {
    referenceNode.parentNode.insertBefore(newNode, referenceNode.nextSibling);
}

var searchbar = document.getElementById("search_keywords");
document.getElementById("search_keywords").onkeyup= function() {
    showResult(this.value);
}

var livesearch = document.createElement("div");
livesearch.id = "livesearch";
insertAfter(livesearch, searchbar);*/
/* End of Auto Suggestion */

[SCRIPT #2]
<script>
function showResult(str) {
  //Get category selection box
  var categoryBar = document.getElementById("search_categories");

  //Doctor
  if(categoryBar.options[categoryBar.selectedIndex].value == 88){
    if (str.length==0) {
      document.getElementById("livesearch").innerHTML="";
      document.getElementById("livesearch").style.border="0px";
      return;
    }
    if (window.XMLHttpRequest) {
      // code for IE7+, Firefox, Chrome, Opera, Safari
      xmlhttp=new XMLHttpRequest();
    } else {  // code for IE6, IE5
      xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
    xmlhttp.onreadystatechange=function() {
      if (this.readyState==4 && this.status==200) {
        document.getElementById("livesearch").innerHTML=this.responseText;
        document.getElementById("livesearch").style.border="1px solid #A5ACB2";
      }
    }
    xmlhttp.open("GET","livesearch_Doctor.php?q="+str,true);
    xmlhttp.send();
  }
  //Lawyer
  else if(categoryBar.options[categoryBar.selectedIndex].value == 89){
    if (str.length==0) {
      document.getElementById("livesearch").innerHTML="";
      document.getElementById("livesearch").style.border="0px";
      return;
    }
    if (window.XMLHttpRequest) {
      // code for IE7+, Firefox, Chrome, Opera, Safari
      xmlhttp=new XMLHttpRequest();
    } else {  // code for IE6, IE5
      xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
    xmlhttp.onreadystatechange=function() {
      if (this.readyState==4 && this.status==200) {
        document.getElementById("livesearch").innerHTML=this.responseText;
        document.getElementById("livesearch").style.border="1px solid #A5ACB2";
      }
    }
    xmlhttp.open("GET","livesearch_Lawyer.php?q="+str,true);
    xmlhttp.send();
  }
  //Mortgage
  else if(categoryBar.options[categoryBar.selectedIndex].value == 91){
    if (str.length==0) {
      document.getElementById("livesearch").innerHTML="";
      document.getElementById("livesearch").style.border="0px";
      return;
    }
    if (window.XMLHttpRequest) {
      // code for IE7+, Firefox, Chrome, Opera, Safari
      xmlhttp=new XMLHttpRequest();
    } else {  // code for IE6, IE5
      xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
    xmlhttp.onreadystatechange=function() {
      if (this.readyState==4 && this.status==200) {
        document.getElementById("livesearch").innerHTML=this.responseText;
        document.getElementById("livesearch").style.border="1px solid #A5ACB2";
      }
    }
    xmlhttp.open("GET","livesearch_Mortgage.php?q="+str,true);
    xmlhttp.send();
  }
  //Realtor
  else if(categoryBar.options[categoryBar.selectedIndex].value == 90){
    if (str.length==0) {
      document.getElementById("livesearch").innerHTML="";
      document.getElementById("livesearch").style.border="0px";
      return;
    }
    if (window.XMLHttpRequest) {
      // code for IE7+, Firefox, Chrome, Opera, Safari
      xmlhttp=new XMLHttpRequest();
    } else {  // code for IE6, IE5
      xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
    xmlhttp.onreadystatechange=function() {
      if (this.readyState==4 && this.status==200) {
        document.getElementById("livesearch").innerHTML=this.responseText;
        document.getElementById("livesearch").style.border="1px solid #A5ACB2";
      }
    }
    xmlhttp.open("GET","livesearch_Realtor.php?q="+str,true);
    xmlhttp.send();
  }
  //All categories
  else{
    if (str.length==0) {
      document.getElementById("livesearch").innerHTML="";
      document.getElementById("livesearch").style.border="0px";
      return;
    }
    if (window.XMLHttpRequest) {
      // code for IE7+, Firefox, Chrome, Opera, Safari
      xmlhttp=new XMLHttpRequest();
    } else {  // code for IE6, IE5
      xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
    xmlhttp.onreadystatechange=function() {
      if (this.readyState==4 && this.status==200) {
        document.getElementById("livesearch").innerHTML=this.responseText;
        document.getElementById("livesearch").style.border="1px solid #A5ACB2";
      }
    }
    xmlhttp.open("GET","livesearch.php?q="+str,true);
    xmlhttp.send();
  }
}
</script>