How to make open 2 link or more pages when clicked

How to make open 2 link or more pages when clicked in html and java

html

<td style="background-color:#EE9933;">
<input type="button" id="logtkt" value="Item Logs tkt" class="button" style="Color:blue;width:170px;position: relative;Top: 1px;Left: 1px" onclick="logtkt()"/>
</td>

js

 function tktNum() {
 var str = document.getElementById('tktTree').value;var t;var res = str.substr(1, 10);
 if (str.substr(0,1) == 0) {t = res;} else {t = str;} tktTree.value = t;}


    function logtkt(){
    var  t = document.getElementById('tktTree').value;
    parent.open("http://-----="+t+"");}