function cDiv(id,classname,content)
{
var dt = document.createElement("div");
dt.id = id;
dt.setAttribute("align","center");
dt.className = classname;
dt.innerHTML = content;
document.body.appendChild(dt);
}

function survey() {
var headID = document.getElementsByTagName("head")[0];         
var cssNode = document.createElement('link');
cssNode.type = 'text/css';
cssNode.rel = 'stylesheet';
cssNode.href = '/css/survey.css';
cssNode.media = 'screen';
headID.appendChild(cssNode);

// open survey box
 cDiv('fs_overlay','fs_overlay','');
// open survey box
var content="";
 content+="<div class='fs_surveyDialog' id='fs_surveyDialog'><div style='position:relative; left:10px;height:30px;border:0px; solid #FFFF00;' onclick=\"close_survey();\">[Close Window]</div><div align=left>แบบสำรวจความพึงพอใจเว็บไซต์ www.bangkokpost.com</div><IFRAME src='http://poll.truehits.net/survey3.php?tabname=s0028944&url=www.bangkokpost.com' NORESIZE HSPACE=0 VSPACE=0 FRAMEBORDER=0 MARGINHEIGHT=0 MARGINWIDTH=0 WIDTH=700 HEIGHT=380></IFRAME></div>";

 cDiv('fs_surveyWrapper','fs_surveyWrapper',content);
}
function close_survey() {
document.getElementById('fs_surveyWrapper').style.display='none';
document.getElementById('fs_overlay').style.display='none';
}

function _gsc(b,s,t){
if (!b || b=="" || !s || s=="" || !t || t=="") return false;
var i1,i2,i3,c="-";
i1=b.indexOf(s);
if (i1 < 0) return false;
i1 += s.length;
i2=b.indexOf(t,i1);
if (i2 < 0) i2=b.length;
return b.substring(i1,i2);
}

var _cookie = document.cookie;
var check_survey = _gsc(_cookie,"submit_truehits_survey=",';');
if(check_survey != 1){
	survey();
	var _exp2=" expires="+ (new Date((new Date()).getTime()+43200000)).toGMTString() +";";
	document.cookie="submit_truehits_survey=1; path=/; "+_exp2+"";
}