<!-- Function for checking numeric format -->
function numok(target,object)

{ var a=target.value;

	var b=isNaN(a);

	if (b==true)

	{alert("Don't use Alphabets");

	 document.getElementById(object).value="";}
}

<!-- Function for checking email format -->
function validate_email(field,object)
{
with (field)
{
apos=value.indexOf("@")

dotpos=value.lastIndexOf(".")

if (apos<1||dotpos-apos<2)

  {alert("Please fill the valid E-mail");

   document.getElementById(object).value="";

   return false}

else {return true}

}

}