function mailpage()
{
	var lessonTitle
	var winheight = 525
	var winwidth = 650
	var wintop = (screen.height - winheight - 200) / 2;
	var winleft = (screen.width - winwidth) / 2;
	var winattrib = "toolbar=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no"

	if(wintop<0){wintop=0};
	
	lessonTitle = document.getElementById("lessonTitle").innerHTML;
	lessonTitle = lessonTitle.replace("##","%23");
	
	urltext="/emailfriend/emailfriend.html?refurl=" + escape(document.location) + "&reftitle=" + lessonTitle;
	winattrib = winattrib + ",height=" + winheight;
	winattrib = winattrib + ",width=" + winwidth;
	winattrib = winattrib + ",top=" + wintop;
	winattrib = winattrib + ",left=" + winleft;

	window.open(urltext,'emailfriend',winattrib);
}

function checkEmail (emailfield, errormsg) {
	if ((emailfield.indexOf('@') < 0) || ((emailfield.charAt(emailfield.length-4) != '.') && (emailfield.charAt(checkEmail.length-3) != '.'))) 
		{
		alert("You have entered an invalid e-mail address in '"+errormsg+"'. Please try again.");
		return false;
		}
	return true;
}

function limitText(textArea, length) {
    if (textArea.value.length >= length) {
        textArea.value = textArea.value.substr(0,length-1);
    }
}

//-----------------------------------------------------------------

function productdetails()
{
var lessonTitle
var winheight = 700
var winwidth = 450
var wintop = (screen.height - winheight - 200) / 2;
var winleft = (screen.width - winwidth) / 2;
var winattrib = "toolbar=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no"

if(wintop<0){wintop=0};

urltext="/productdetails/sample.html";
winattrib = winattrib + ",height=" + winheight;
winattrib = winattrib + ",width=" + winwidth;
winattrib = winattrib + ",top=" + wintop;
winattrib = winattrib + ",left=" + winleft;

window.open(urltext,'sample',winattrib);
}