function clearText(field)
 {

    if (field.defaultValue == field.value) field.value = '';
    else if (field.value == '') field.value = field.defaultValue;

}
function sub()
{
	if(document.subscribe.email.value=='Enter Email Address')
	{
	alert('Please Enter Email');
	document.subscribe.email.focus();
	return false;
	}
	if(document.subscribe.email.value!='')
	{
		emailExp= /^\w+(\-\w+)*(\.\w+(\-\w+)*)*@\w+(\-\w+)*(\.\w+(\-\w+)*)+$/;
     if (!(emailExp.test(document.subscribe.email.value)))
		 {
		 	alert('Please Enter Valid E-mail Address.');
			document.subscribe.email.focus();
			return false;
			
		 }
 	}
	
	
	
	return true;

}