Problems encountered in FireFox when using JS to submit parameters to create a form_javascript skills

functionloadConfig(gameUrl,skinId){
varpageDiv=document.getElementById("page");
vartemp=document.createElement("form");
temp.action="${createLink(controller:'mobileConfig',action:'beforeLaunchConfig')}";
temp.method="POST";
temp.style.visibility="hidden";
temp.name="loadConfigPage";
varopt=document.createElement("input");
opt.name="gameUrl";
opt.id="gameUrl";
opt. value=gameUrl;
varopt2=document.createElement("input");
opt2.name="skinId";
opt2.id="skinId";
opt2.value=skinId;
temp.appendChild(opt);
temp.appendChild(opt2);
pageDiv.appendChild(temp);
temp.submit();
}