function validate(frm) {
	var thisFrm = returnObjById(frm);
	var cod = thisFrm.txtid.value;
	var str_err = "";
	
	if (cod.length!=7 && cod.length!=8) {
		str_err = "Nu ati introdus un cod de oferta valid!";
	} else {
		var first_letter = cod.substr(0,1);
		if(first_letter!="A" && first_letter!="X" && first_letter!="Y" && first_letter!="W" && first_letter!="Q") {
			str_err = "Nu ati introdus un cod de oferta valid!";
		} else {
			var second_letter = cod.substr(1,1);
			if(second_letter!="C" && second_letter!="R" && second_letter!="T") {
				str_err = "Nu ati introdus un cod de oferta valid!";
			} else {
				if(cod.length==8) {
					var third_letter = cod.substr(2,1);
					if(third_letter!="C" && third_letter!="R" && third_letter!="T") {
						str_err = "Nu ati introdus un cod de oferta valid!";
					}
				}
			}
		}
	}
	
	return str_err;
}

function empty_cod(frm) {
	var thisFrm = returnObjById(frm);
	var cod = thisFrm.txtid.value;
			
	if (cod=="cod oferta") {
		thisFrm.txtid.value="";
	}
}

function ajaxFunction(frmid){
	
	if (validate(frmid)!="") {
		alert("EROARE:\nNu ati introdus un cod de oferta valid!");
	} else {
		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){
			
				if (ajaxRequest.responseText=="") {
					alert("EROARE:\nCodul introdus nu este valid sau oferta nu mai este de actualitate!");
				} else {
					window.location.href=ajaxRequest.responseText;
				}
			}
		}
		
		var cod = document.getElementById('txtid').value;
		var queryString = "?cod=" + cod;
		
		ajaxRequest.open("GET", "include/cautare-cod.php" + queryString, true);
		ajaxRequest.send(null);
	}
}