 function LengthTest(source, args) {
   var result = true;
   if (args.Value.length<3)     
       result = false;
   args.IsValid = result;
 }

function IsEmail(source, args) {
    var result = false;    
    if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(args.Value))
       result = true;
    args.IsValid = result;
}


function OpenWnd(strURL){
         var objWnd = window.open(strURL,"InfoDetail","scrollbars=no,height=500,width=400,left=10,top=10");
         objWnd.focus();
}

function SetCommand(Key, Value){
    document.getElementById('__cmdVal').value=Value;
    document.getElementById('__cmdKey').value=Key;
}


function getObj(name) { // zjisti dostupný objekt pro práci se stylem dokumentu
  if (document.getElementById) 
    return document.getElementById(name).style;
  else
    if (document.all) 
      return document.all[name].style;
    else
      if (document.layers) 
        return document.layers[name];
}
function BlikFunction() { 
  BlikOk=true; 
  if (BlikCount==0 && BlikOk==true){
    BlikObj.visibility="hidden";BlikOk=false;BlikCount=1
  } 
  if (BlikCount==1 && BlikOk==true){
    BlikObj.visibility="visible";BlikOk=false;BlikCount=0;
  } 
  setTimeout('BlikFunction()',1000); 
}


function AcceptTermsCheckBoxValidation(source, args)  {
 var theCheckBox = document.getElementById('agree_terms').getElementsByTagName('input');
 args.IsValid = document.getElementById(theCheckBox[0].id).checked;
}

function ValidateSearch()
{
    if(document.forms[0].SrchTxt.value.length==0)
    {
        document.forms[0].SrchTxt.focus(); 
        alert('Zadejte hledany vyraz');return false;
    }
    else if(document.forms[0].SrchTxt.value.length<3)
    {
        document.forms[0].SrchTxt.focus(); 
        alert('Delka hledaneho slova musi byt vetsi nez 2 znaky');return false;
    }
    else
        return true;    
   
}

//really not important (the first two should be small for Opera's sake)
PositionX = 10;
PositionY = 10;
defaultWidth  = 600;
defaultHeight = 400;

//kinda important
var AutoClose = true;

//don't touch
function popImage(imageURL,imageTitle){
  var imgWin = window.open('','_blank','scrollbars=no,resizable=1,width='+defaultWidth+',height='+defaultHeight+',left='+PositionX+',top='+PositionY);
  if( !imgWin ) { return true; } //popup blockers should not cause errors
  imgWin.document.write('<html><head><title>'+imageTitle+'<\/title><script type="text\/javascript">\n'+
    'function resizeWinTo() {\n'+
    'if( !document.images.length ) { document.images[0] = document.layers[0].images[0]; }'+
    'var oH = document.images[0].height, oW = document.images[0].width;\n'+
    'if( !oH || window.doneAlready ) { return; }\n'+ //in case images are disabled
    'window.doneAlready = true;\n'+ //for Safari and Opera
    'var x = window; x.resizeTo( oW + 200, oH + 200 );\n'+
    'var myW = 0, myH = 0, d = x.document.documentElement, b = x.document.body;\n'+
    'if( x.innerWidth ) { myW = x.innerWidth; myH = x.innerHeight; }\n'+
    'else if( d && d.clientWidth ) { myW = d.clientWidth; myH = d.clientHeight; }\n'+
    'else if( b && b.clientWidth ) { myW = b.clientWidth; myH = b.clientHeight; }\n'+
    'if( window.opera && !document.childNodes ) { myW += 16; }\n'+
    'x.resizeTo( oW = oW + ( ( oW + 200 ) - myW ), oH = oH + ( (oH + 200 ) - myH ) );\n'+
    'var scW = screen.availWidth ? screen.availWidth : screen.width;\n'+
    'var scH = screen.availHeight ? screen.availHeight : screen.height;\n'+
    'if( !window.opera ) { x.moveTo(Math.round((scW-oW)/2),Math.round((scH-oH)/2)); }\n'+
    '}\n'+
    '<\/script>'+
    '<\/head><body onload="resizeWinTo();"'+(AutoClose?' onblur="self.close();"':'')+'>'+
    (document.layers?('<layer left="0" top="0">'):('<div style="position:absolute;left:0px;top:0px;display:table;">'))+
    '<img src="'+imageURL+'" alt="Loading image ..." title="" onload="resizeWinTo();">'+
    (document.layers?'<\/layer>':'<\/div>')+'<\/body><\/html>');
  imgWin.document.close();
  if( imgWin.focus ) { imgWin.focus(); }
  return false;
}

function ValidateSize(Val)
{  
    if (Val === null)
        return true;
    if(Val.value==0)
    {
        alert("Zadejte prosim velikost!");
        return false;
    }
    return true;
}   
function AppendBasketParam(key, param)
{

  if (param === null)
        return
    document.getElementById('__BasketParams').value+=key + param.value;
}

function onFocus(obj,defaulttext)
{

    if(obj.value.length==defaulttext.length) 
    {
        obj.value='';
    }
}

function onLostFocus(defaulttext,obj)
{
    if(obj.value.length==0)
    {
        obj.value=defaulttext;

    }
}
