function IsAnEmail(emailStr) 
{
	var emailPat=/^(.+)@(.+)$/
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
	var validChars="\[^\\s" + specialChars + "\]"
	var quotedUser="(\"[^\"]*\")"
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
	var atom=validChars + '+'
	var word="(" + atom + "|" + quotedUser + ")"
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
	var matchArray=emailStr.match(emailPat)
	if (matchArray==null) 
	{
		return false
	}
	var user=matchArray[1]
	var domain=matchArray[2]
	if (user.match(userPat)==null) 
	{
		return false
	}
	var IPArray=domain.match(ipDomainPat)
	if (IPArray!=null) 
	{
		for (var i=1;i<=4;i++) 
		{
			if (IPArray[i]>255) 
			{
				return false
	    		}
		}
    	return true
	}
	var atomPat=new RegExp(atom,"g")
	var domArr=domain.match(atomPat)
	var len=domArr.length
	if (domArr[domArr.length-1].length<2 || domArr[domArr.length-1].length>3) 
	{
		return false
	}
	if (len<2) 
	{
		return false
	}
	return true;
}

function checkBeforeSubmit()
{
	if(!(IsAnEmail(document.all['email'].value)))
	{
		alert('Your email is not valid!');
		document.copydoc.email.focus();
		return false;
	}
	else
	{
		i = 0;
		while (i < eval("document.all['message'].value.length"))
		{
			if (escape(eval("document.all['message'].value").charAt(i))=="%0D") 
			{
				if (escape(eval("document.all['message'].value").charAt(i+1))=="%0A") 
         			{
					right1 = eval("document.all['message'].value.substring(0,i)") + "<br>"+ eval("document.all['message'].value.substring(i+2,document.all['message'].value.length)");
					eval("document.all['message'].value = right1");
				}
		}
	  	i++;
		}
		return true;
	}
}