function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

var loading_form = "Checking...";

// Check value 1 -------------------------------------------
function check(id_input, value, id_output) {
	var req = ajax(); //Build Object
	req.open('POST', 'assessment_chk.php', true); // Ajax task status post
	req.onreadystatechange = function () { // coupon event
		if (req.readyState == 4) { // End task
			if (req.status == 200) { // Accept from server
				var result = req.responseText; // Message from open file
				document.getElementById(id_output).innerHTML = result; // Display result
				document.assessment.submit.disabled = false; // Enable submit 
			}
		} else {
			document.assessment.submit.disabled = true; // Disable submit on process....
			document.getElementById(id_output).innerHTML = loading_form; // Loading...
		}
	}
	req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=tis-620"); // Header 
	req.send(id_input+"="+value); // Send query
}

// Check form submit status
function form_valid() {
	var agree_stat = document.assessment.agree.checked;
	var name_stat = document.assessment.name_stat.value;
	var email_stat = document.assessment.email_stat.value;
	var phone_stat = document.assessment.phone_stat.value;
	var city_stat = document.assessment.city_stat.value;
	var st_stat = document.assessment.st_stat.value;
	var sym_stat = document.assessment.sym_stat.value;
	var exp_stat = document.assessment.exp_stat.value;
	
	if (agree_stat && name_stat == "true" && email_stat == "true" && phone_stat == "true" && city_stat == "true" && st_stat == "true" && sym_stat == "true" && exp_stat == "true") {
		return true;
	} else {
		alert("Your message could not be submitted because all field is require value.");
		return false;
	}
}