var mobile = (/iphone|ipad|ipod|android|blackberry|mini|windows\sce|palm/i.test(navigator.userAgent.toLowerCase()));  
    if (getMobileAvoidCookie() == false && mobile) {  
        if (confirm('Visit our Mobile site?\n OK=Yes, Cancel=Don\'t ask again')) {
			goMobile();
	 	}
		else {
			setMobileAvoidCookie(30); // 30 days
		}
	}  

	function goMobile() {
		clearMobileAvoidCookie();
		document.location = mobilesiteurl;
	}

    function setMobileAvoidCookie(exdays)
    {
    	var exdate=new Date();
    	exdate.setDate(exdate.getDate() + exdays);
    	var c_value=escape("true") + ((exdays==null) ? "" : "; expires="+exdate.toUTCString());
    	document.cookie="bc4_mavoid=" + c_value;
    }

    function clearMobileAvoidCookie()
    {
    	var exdate=new Date();
    	exdate.setDate(exdate.getDate() - 10);
    	var c_value=escape("true") + "; expires="+exdate.toUTCString();
    	document.cookie="bc4_mavoid=" + c_value;
    }

    function getMobileAvoidCookie()
    {
		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=="bc4_mavoid") {
        		return true;
        	}
      	}
    	return false;
   }