Wizzer's Blog

function sel(obj){
         var id=obj.value;
         var qx=document.getElementsByName("id");
         for(var i = 0; i < qx.length; i ++)
           {
               if(qx[i].type == "checkbox")
                {
                  var v=qx[i].value;
                  if(v!=""&&v.length>id.length&&v.startWith(id)){
                      if(obj.checked){
                          qx[i].checked=true;
                      } else{
                           qx[i].checked=false;
                      }
                  }
                   if(v!=""&&v.length<id.length&&id.startWith(v)){
                      if(obj.checked){
                      } else{
                           qx[i].checked=false;
                      }
                  }

                }
           }

<input onclick="sel(this)" type="checkbox" name="id" value="0001" />0001

<input onclick="sel(this)" type="checkbox" name="id" value="00010001" />00010001

<input onclick="sel(this)" type="checkbox" name="id" value="00010002" />00010002

<input onclick="sel(this)" type="checkbox" name="id" value="00010003" />00010003