// JavaScript Document
function checkOpinion()
{
	var frm		= document.opinion;
	var errors 	= '';
	
	if(frm.name.value == '')
	{
		errors += '- Your Name is missing\n';
	}
		
	if(frm.email.value == '')
	{
		errors += '- Please enter your email address\n';
	} else	if(!echeck(frm.email.value))
	{
		errors += '- Please enter a valid email address\n';
	}
		
	if(errors)
	{
		alert('The following error(s) occured:\n'+errors);
		return false;
	} else
	{
		return true;	
	}
}

function checkWatch()
{
	var frm		= document.watchOnline;
	var errors 	= '';
		
	if(frm.yremail.value == '')
	{
		errors += '- Please enter your email address\n';
	} else	if(!echeck(frm.yremail.value))
	{
		errors += '- Please enter a valid email address\n';
	}
	
	if(frm.fremail.value == '')
	{
		errors += '- Please enter your friend\'s email address\n';
	} else	if(!echeck(frm.fremail.value))
	{
		errors += '- Please enter a valid email address for your friend\n';
	}
		
	if(errors)
	{
		alert('The following error(s) occured:\n'+errors);
		return false;
	} else
	{
		return true;	
	}
}

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){
	   return false
	}

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

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

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

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

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

	 return true					
}