function highlight(field) {
	field.focus();
	field.select();
	}

function hide_show(id){
	var str_show = document.all[id].style.display;
	if (str_show == 'block'){document.all[id].style.display = 'none';} else {document.all[id].style.display = 'block';}
	}
<!-- Begin
var checkflag = "false";
function check(field) {
	if (checkflag == "false") {
		for (i = 0; i < field.length; i++) {field[i].checked = true;}
			checkflag = "true";
			return true;
			} else {
				for (i = 0; i < field.length; i++) {field[i].checked = false; }
				checkflag = "false";
				return false;
				}
		}
//  End -->
function selectm(id){
  var field1 = document.getElementById(id);
  var field2 = document.getElementById('imfolder');
  for(a=0;a<field1.length;a++){
    if (field1.options[a].selected){field2.value = field1.options[a].text;}
    }
  }

function authorization(hst){
	document.getElementById('author').style.display='block';
	document.getElementById('mhost').value=hst;
	}
function addfields(selector){
	if (selector == 'yes'){
		document.getElementById("af").innerHTML = '11. <input name="file_10" type="file" size=70><br><br>12. <input name="file_11" type="file" size=70><br><br>13. <input name="file_12" type="file" size=70><br><br>14. <input name="file_13" type="file" size=70><br><br>15. <input name="file_14" type="file" size=70><br><br>16. <input name="file_15" type="file" size=70><br><br>17. <input name="file_16" type="file" size=70><br><br>18. <input name="file_17" type="file" size=70><br><br>19. <input name="file_18" type="file" size=70><br><br>20. <input name="file_19" type="file" size=70><br><br><a href="#" onclick="addfields(\'no\');"><b>no, no ! :)</b></a>'; 
		} else {
		document.getElementById("af").innerHTML = '<a href="#" onclick="addfields(\'yes\');"><b>Upload more files ;)</b></a>';
		}
}