function checkform()
{
var errormsg;
errormsg=true;
if(document.getElementById("username").value==null || document.getElementById("username").value=="")
{
document.getElementById("username_d").innerHTML="<font color=red>用户名不能为空</font>";
document.getElementById("username").focus();
errormsg=false;
}
else
{
document.getElementById("username_d").innerHTML="帐户名";
}

if(document.getElementById("password").value==null || document.getElementById("password").value=="")
{
document.getElementById("password_d").innerHTML="<font color=red>密码不能为空</font>";
document.getElementById("password").focus();
errormsg=false;
}
else
{
document.getElementById("password_d").innerHTML="登录密码";
}

if(document.getElementById("verify").value==null || document.getElementById("verify").value=="")
{
document.getElementById("verify_d").innerHTML="<font color=red>验证码不能为空</font>";
document.getElementById("verify").focus();
errormsg=false;
}
else
{
document.getElementById("verify_d").innerHTML="请将下面的文字输入框中";
}
if(errormsg)
{
CheckLogin();
}
}

function tabit(id,cid) {
tabagent.className="taboff";tabprice.className="taboff";tabkehu.className="taboff";id.className="tabon";
cagent.style.display="none";cprice.style.display="none";ckehu.style.display="none";cid.style.display="block";
//winname=cid;
}
function showall() {
tabagent.className="tabon";tabprice.className="tabon";tabkehu.className="tabon";
cagent.style.display="block";cprice.style.display="block";ckehu.style.display="block";
}

function testid()
{
   document.login.username.value='kitten';
   document.login.password.value='123000';
   document.login.verify.focus();
   alert("欢迎光临，现在您只须输入验证码即可登录体验！");
}

function killErrors() {
return true;
}

if (top.location != location)
top.location.href = location.href;

window.onerror = killErrors;