var interstitialPopUp = null;

function getCookie(name)
{
    var dc = document.cookie;
    var prefix = name + "=";
    var begin = dc.indexOf("; " + prefix);
    if (begin == -1)
    {
        begin = dc.indexOf(prefix);
        if (begin != 0) return null;
    }
    else
    {
        begin += 2;
    }
    var end = document.cookie.indexOf(";", begin);
    if (end == -1)
    {
        end = dc.length;
    }
    return unescape(dc.substring(begin + prefix.length, end));
}


function dontleave(strLink){

if (getCookie("survey") == "done")	{
	window.location = strLink;
} else	{


	var w = 480, h = 340;
	var popW = 380, popH = 200;
	if (document.all || document.layers) {
		w = screen.availWidth;
	    h = screen.availHeight;
	}
	var leftPos = (w-popW)/2, topPos = (h-popH)/2;
	interstitialPopUp =  window.open("interstitialwarning.php?link="+strLink,"","toolbar=no,status=no,menubar=no,scrollbars=no,resizable=no,width="+popW+",height="+popH+",top="+topPos+",left="+leftPos);
	}
}