function Process(t) {

	var parametry="";
	
	if(t>=1)parametry+="&typ="+document.getElementById('select1').options[document.getElementById('select1').selectedIndex].value;
	if(t>=2)parametry+="&znacka="+document.getElementById('select2').options[document.getElementById('select2').selectedIndex].value;
	if(t>=3)parametry+="&model="+document.getElementById('select3').options[document.getElementById('select3').selectedIndex].value;
	if(t>=4)parametry+="&specifikace="+document.getElementById('select4').options[document.getElementById('select4').selectedIndex].value;
	
	var http_request = false;
    var request = "mp=select"+parametry;
        
        if (window.XMLHttpRequest) {
            http_request = new XMLHttpRequest();
        } else if (window.ActiveXObject) { 
            try {
              http_request = new ActiveXObject("Msxml2.XMLHTTP");
            } catch (error) {
              http_request = new ActiveXObject("Microsoft.XMLHTTP");
            }
        }
        
        http_request.onreadystatechange = function() {
		        if (http_request.readyState == 4) {
		            if (http_request.status == 200) {
			            
					
			            if(http_request.responseText!=""){
				          
						eval(http_request.responseText);
						document.getElementById("select"+t).focus();
						
						}
		            }
		        }
	        };
        http_request.open('POST', 'ajax.php', true);
        http_request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
        http_request.send(request);
        
}

function SHFormSubmit(){
document.getElementById('selecthledaniform').submit();
}