function checkemail(email,block)
	{
	var emailrule = new RegExp("^[0-9a-z]{1}([-_.]?[0-9a-z]{1})*[@]{1}[0-9a-z]{1}([-.]?[0-9a-z]{1})*[.]{1}[a-z]{2,4}$","ig");
	if (emailrule.test(document.getElementById(email).value))
		{
		document.getElementById(block).style.display="none";
		return true;
		}
	else
		{
		document.getElementById(block).style.display="block";
		document.getElementById(email).focus();
		return false;
		}
	}
function checkform(field,block)
	{
	if (document.getElementById(field).value!="")
		{
		document.getElementById(block).style.display="none";
		return true;
		}
	else
		{
		document.getElementById(block).style.display="block";
		document.getElementById(field).focus();
		return false;
		}
	}