var zobrazena=false;

function ideme()
{
	alert('ideme');
}

function ajax_prepare()
{
	var xmlHttp;
	try
  	{
  // Firefox, Opera 8.0+, Safari
  		xmlHttp=new XMLHttpRequest();
  	}
	catch (e)
  	{
  // Internet Explorer
  		try
    	{
    		xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    	}
  		catch (e)
    	{
    		try
      		{
      			xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
      		}
    		catch (e)
      		{
      			alert("Your browser does not support AJAX!");
      			return false;
      		}
    	}
  	}
  	return xmlHttp;
}      

function kontaktujte_capcha()
{
	if (zobrazena==false) {
		document.getElementById('kontaktujte_capcha').style.display="block"
		//zobrazena=true;
		var xmlHttp;
		xmlHttp=ajax_prepare();
		if (xmlHttp===false)
		  	return false;
		xmlHttp.onreadystatechange=function()
		{
		    if(xmlHttp.readyState==4)
		    {
		      	document.getElementById('kontaktujte_capcha').innerHTML=xmlHttp.responseText;
		    }
		}
		xmlHttp.open("POST","./captcha.php",true);
		xmlHttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
		xmlHttp.setRequestHeader("Content-length", 0);
		xmlHttp.setRequestHeader("Connection", "close");
  		xmlHttp.send(null);  	
		zobrazena=true;
  		return false;
	}
	return true;
}