function ukazZnacky( s , formular){
	var ajaxRequest;  // The variable that makes Ajax possible!
//  var elementid = 'span_znacky_'+formular;

	
	if( s.value == "" )
	{
	   //document.getElementById(elementid).innerHTML = '<select name="select_znacky" onchange="ukazModely( '+s+', '+formular+')"><option value="">Značka vozidla</option></select>';
	   document.forms[formular]['select_modely'].innerHTML = '<option value="">Model vozidla</option>';	   
	}
	else
	{
    	try{
    		// Opera 8.0+, Firefox, Safari
    		ajaxRequest = new XMLHttpRequest();
    	} catch (e){
    		// Internet Explorer Browsers
    		try{
    			ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
    		} catch (e) {
    			try{
    				ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
    			} catch (e){
    				// Something went wrong
    				alert("Your browser broke!");
    				return false;
    			}
    		}
    	}
    	// Create a function that will receive data sent from the server
    	ajaxRequest.onreadystatechange = function(){
    		if(ajaxRequest.readyState == 4){		     
    		 document.getElementById('span_znacky_'+formular).innerHTML = '<select name="select_znacky" onchange="ukazModely(this, \''+formular+'\')"><option value="">Značka vozidla</option>'+ajaxRequest.responseText+'</select>';
          
    		}
    	}
    	ajaxRequest.open("GET", "js/ukazznacky.php?druh=" + s.value, true);
    	ajaxRequest.send(null);  
  }
};

function ukazModely( s, formular ){
	var ajaxRequest;  // The variable that makes Ajax possible!
	try{
		// Opera 8.0+, Firefox, Safari
		ajaxRequest = new XMLHttpRequest();
	} catch (e){
		// Internet Explorer Browsers
		try{
			ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try{
				ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e){
				// Something went wrong
				alert("Your browser broke!");
				return false;
			}
		}
	}
	// Create a function that will receive data sent from the server
	ajaxRequest.onreadystatechange = function(){
		if(ajaxRequest.readyState == 4){
		 // alert( ajaxRequest.responseText);    
   //   
			document.getElementById('span_modely_'+formular).innerHTML = '<select name="select_modely"><option value="">Model vozidla</option>' +ajaxRequest.responseText+'</select>';
		}
	}
	ajaxRequest.open("GET", "js/ukazmodely.php?znacka=" + s.value, true);
	ajaxRequest.send(null); 
};