function checkCommentEmailBeforeSend()
	{
	var emailID=document.getElementById('email_email');
	if (emailID.value==null || emailID.value=="" || echeck(emailID.value)==false)
		{
		document.getElementById('email_error').innerHTML="Please enter a valid e-mail address.";
		}
	else 	{
		var poststr = "?&from="+escape(document.getElementById('email_email').value)
			+"&topic="+escape(document.getElementById('email_topic').value)
			+"&message="+escape(document.getElementById('email_message').value);
		makePOSTRequest('php/email.php', poststr,'content',0);
		}
	}

function bademail()
	{
	if (document.getElementById("email_email")) { var e=document.getElementById("email_email"); e.value="Valid e-mail address"; e.focus(); }
	else if (document.getElementById("visitormail")) { var e=document.getElementById("visitormail"); e.value="Valid e-mail address"; e.focus(); }
	}

function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   bademail();
		   return false;
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   bademail();
		   return false;
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    bademail();
		    return false;
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    bademail();
		    return false;
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    bademail();
		    return false;
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    bademail();
		    return false;
		 }
		
		 if (str.indexOf(" ")!=-1){
		    bademail();
		    return false;
		 }
 		 return true;				
	}

function banner(x,y)
	{var poststr = "name="+escape(x)+"&location="+escape(y);
	makePOSTRequest('php/banner.php', poststr,'',4);
	}