function checktip()
{
//    document.getElementById('lb_name').style.color = '#000000';
//	document.getElementById('lb_name').style.fontWeight = 'normal';
	document.getElementById('lb_email').style.color = '#000000';
	document.getElementById('lb_email').style.fontWeight = 'normal';
    document.getElementById('lb_subject').style.color = '#000000';
	document.getElementById('lb_subject').style.fontWeight = 'normal';
//	if(document.getElementById('fname').value.length < 1)
//	{
//        document.getElementById('lb_name').style.color = '#FF0000';
//		document.getElementById('lb_name').style.fontWeight = 'bold';
//		document.getElementById('fname').focus();
//        return false;
//    }
	if(!validate(document.getElementById('email').value))
	{
		document.getElementById('lb_email').style.color = '#FF0000';
		document.getElementById('lb_email').style.fontWeight = 'bold';
		document.getElementById('email').focus();
		return false;
	}
	if(document.getElementById('subject').selectedIndex == 0)
	{
	    document.getElementById('lb_subject').style.color = '#FF0000';
	    document.getElementById('lb_subject').style.fontWeight = 'bold';
	    return false;
	}
	if(document.getElementById('description').value.length < 5)
	{
	    document.getElementById('lb_tip').style.color = '#FF0000';
	    document.getElementById('lb_tip').style.fontWeight = 'bold';
	    return false;
	}
    return true;
}
function checkcontact()
{
    document.getElementById('lb_email').style.color = '#000000';
	document.getElementById('lb_email').style.fontWeight = 'normal';
    if(!validate(document.getElementById('email').value))
	{
		document.getElementById('lb_email').style.color = '#FF0000';
		document.getElementById('lb_email').style.fontWeight = 'bold';
		document.getElementById('email').focus();
		return false;
	}
	if(document.getElementById('description').value.length < 5)
	{
	    document.getElementById('lb_tip').style.color = '#FF0000';
	    document.getElementById('lb_tip').style.fontWeight = 'bold';
	    return false;
	}
}
function validate(email) {
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   if(reg.test(email) == false) {
      return false;
   }
   return true;
}