function confirmmail()
{
	var condi=true;
	if(document.form1.email_add.value.length==0)
	{
		alert("Please enter your mail address.");
		if(condi==true)
		{
			document.form1.email_add.focus();
		}
		condi=false;
		return false;
	}
	else
	if(!checkMail(document.form1.email_add.value))
	{
		alert("Email must contain an email address.");
		if(condi==true)
		{
			document.form1.email_add.focus();
		}
		condi=false;
		return false;
	}
	if(document.form1.purpose.value.length==0)
	{
		alert("Please enter subject.");
		if(condi==true)
		{
			document.form1.purpose.focus();
		}
		condi=false;
		return false;
	}
	if(document.form1.mesg.value.length==0)
	{
		alert("Please enter message.");
		if(condi==true)
		{
			document.form1.mesg.focus();
		}
		condi=false;
		return false;
	}
}
function checkMail(email)
{
	var x = email;
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (filter.test(x)) 
	{
	 return true;
	}
	else 
	{
	  return false;
	}
}