获取手机验证码js计时器

var timeOut;
var countdown=60; 
function settime() { 
    if (countdown == 0) { 
    	$('#chkcode').removeAttr("disabled"); 
    	userinfoform.chkcode.value="获取验证码"; 
        countdown = 60; 
        return;
    } else { 
    	$('#chkcode').attr("disabled","disabled"); 
    	userinfoform.chkcode.value="重新发送(" + countdown + ")"; 
        countdown--; 
    } 
timeOut = setTimeout(function() { 
    settime() }
    ,1000); 
}

获取showDialog的父窗口对象

window.showModalDialog(" ", window, "");

var args = window.dialogArguments;