Timeouts for Page in Javascript

clearTimeout(thecurrentTimeout); thecurrentTimeout = setTimeout(setIdle,30000);//30s

  clearTimeout(thecurrentTimeout);
   thecurrentTimeout = setTimeout(setIdle,1000);//30s
   alert("dddd :"+thecurrentTimeout);


   setTimeout("alert('Naveen1')", 4 * 60 * 1000);
   setTimeout("alert('Naveen2')", 8 * 60 * 1000);
   setTimeout("alert('Naveen3')", 12 * 60 * 1000);



   setTimeout("funcone();", 4 * 60 * 1000);
   setTimeout("funcone();", 8 * 60 * 1000);
   setTimeout("funcone();", 12 * 60 * 1000);
   setTimeout("funcone();", 16 * 60 * 1000);


   setTimeout("funcone('2');", 1 * 10 * 1000);
   setTimeout("funcone('3');", 1 * 20 * 1000);
   setTimeout("funcone('4');", 1 * 30 * 1000);
   setTimeout("funcone('5');", 1 * 40 * 1000);
   function funcone(obj){   
   var objval=obj.toString();  
        document.setActive();
        if(document.setActive()) {
        document.forms[0].t1.value=parseInt(objval);
        alert(document.forms[0].t1.value);
   }