// JavaScript Document
function chk_email()
{
	var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
		if(document.subscribe.newsletter.value=='')
		{
			alert('Please Enter Your E-mail Address !!');
			}
		else if(!filter.test(document.subscribe.newsletter.value))
			{
			alert('Please Enter Valid E-mail Address !!');
			}
		else
			{
			document.subscribe.op.value=1;
			document.subscribe.submit();
			}
		}