var vis = 0;
var nextfile = 1;
var testpos = 1, testcount=20;


function tst() {
  if (testpos == 0) vis = document.getElementById('test0'); 
  if (testpos == testcount-1) {
     document.getElementById("testSubmit").value="Отправить";
  } 
  if (testpos == testcount) {
     document.forms["testForm"].submit();
  } else {
   hide('test'+(testpos-1));
   unhide('test'+testpos);
   document.getElementById('edit'+testpos).focus();
  };
  document.getElementById("testSubmit").disabled=true;
  testpos++;
}

function chk(el) {
  document.getElementById("testSubmit").disabled=(el.value=='');  
}

function IsNumeric(sText)

{
   var ValidChars = "0123456789";
   var IsNumber=true;
   var Char;

   if ( sText <= 0 ) IsNumber = false;
 
   for (i = 0; i < sText.length && IsNumber == true; i++) 
      { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
         {
         IsNumber = false;
         }
      }

   return IsNumber;
   
   }



function huh(elementName){
        var el;
//        alert(elementName);
        el = document.getElementById(elementName); 

        if (el.style.display == "none")
          {
           if (vis) vis.style.display = "none";
           el.style.display = "";
           vis = el;
          } 
        else
          {
           el.style.display = "none";
           vis = 0;
          }
}


function unhide(elementName){
        document.getElementById(elementName).style.display="";
}

function hide(elementName){
        document.getElementById(elementName).style.display="none";
}

function confirmLink(theLink, theSqlQuery)
{
    var is_confirmed = confirm(theSqlQuery);    
    return is_confirmed;
}



function addFile(n){
  var fl, al;
//  alert("file"+n);
  fl = document.getElementById("file"+n); 
  fl.type = "file";

  if (n < 9) document.nextfile = n+1;
  else {  
   al = document.getElementById("addFile"); 
   al.style.display = "none";
  } 
}