Trigger popup after time

<script src="/scripts/dev/min/jquery.cookie-min.js"></script>

<img id="liveChat" src="/media/6015/lc-button3.png"
     style="cursor: pointer; cursor:hand; position: fixed; left: 0; top: 300px; display: none; height: 140px; z-index: 999;" class="nonResponsive mobiHide" onclick="Velaro.Engagement.LoadPopoutChat()">
 
<script type="text/javascript">
jQuery(document).ready(function(){
    if (getCookie('chat_shown') != 'true')
    {
        var timeout_show_chat = setTimeout('showChat()', 30*1000);
    }
    else
    {
        showChat();
    }
});
 
function showChat()
{
    if (jQuery('.yoursubdomain_floatbtn').css('display') == 'none' && getCookie('chat_shown') != 'true')
    {
        setCookie('chat_shown', 'true', 60);
    }
    jQuery('style[data-type="csupport_preload"]').remove();
}
 
function setCookie(c_name,value,exdays)
{
    var exdate=new Date();
    exdate.setDate(exdate.getDate() + exdays);
    var c_value=escape(value) + ((exdays==null) ? "" : "; expires="+exdate.toUTCString());
    document.cookie=c_name + "=" + c_value;
}
 
function getCookie(c_name)
{
    var i,x,y,ARRcookies=document.cookie.split(";");
    for (i=0;i<ARRcookies.length;i++)
    {
        x=ARRcookies[i].substr(0,ARRcookies[i].indexOf("="));
        y=ARRcookies[i].substr(ARRcookies[i].indexOf("=")+1);
        x=x.replace(/^\s+|\s+$/g,"");
        if (x==c_name)
        {
            return unescape(y);
        }
    }
}
</script>