function blank_field_email(str,value)
{
	if(Trim(document.getElementById(str).value) == value)
	{
		document.getElementById(str).value = "";
	}	
}
function fill_field_email(str,value)
{
	if(Trim(document.getElementById(str).value) == "")
	{
		document.getElementById(str).value = value;
	}	
}