function flipBG(id, value){
	if(value == 0)
		file = "images/shop/buy01.gif";
	else
		file = "images/shop/buy02.gif";
	
	document.getElementById(id).style.backgroundImage='url(' + file + ')';
	document.getElementById(id).style.backgroundRepeat='no-repeat';
	
}


function getLicenseOptions(gameName){
	if(document.getElementById("dist").value != 0){
		html = 	"<br /><select name='licenses' id='licenses' class='select'>" +
	  			"<option value='0'> -- Select number of licenses --</option>" + 
				"<option value='1-user'>" + gameName + " - 1 user license</option>" + 
				"<option value='15-users'>" + gameName + " - 15 user licenses</option>" + 
				"<option value='school-license'>" + gameName + " - School license</option>" + 
				"</select>";
		document.getElementById("licensBox").innerHTML = html;
	}
	
	if(document.getElementById("dist").value == "online"){
		html = 	"<br /><br /><select name='subscript' id='online' class='select'>" + 
				"<option value='0'> -- Select subscription period --</option>" + 
				"<option value='1-year'>1 year</option>" + 
				"<option value='2-years'>2 years</option>" + 
				"<option value='3-years'>3 years</option>" + 
				"</select>";
		document.getElementById("licensBox").innerHTML += html;		
	}
}


function checkForm(){
	ok = true;
	
	
	if(document.getElementById("dist").value == 0){
			ok = false;
			alert("Please select an distribution type");
	}
	else if(document.getElementById("adtype").value == "gcla"){
		if(document.getElementById("dist").value == "digital"){
			if(document.getElementById("licenses").value == 0){
				ok = false;
				alert("Please select number of licenses");
			}
			else if(document.getElementById("online").value == 0){
				ok = false;
				alert("Please select subscription period");
			}
		}
		else {
			if(document.getElementById("licenses").value == 0){
				ok = false;
				alert("Please select number of licenses");
			}
		}
	}
	else {
		if(document.getElementById("licenses").value == 0){
			ok = false;
			alert("Please select number of licenses");
		}
	}
	return ok;
}