var whitespace = " \t\n\r";





      /****************************************************************/





      // Check whether string s is empty.


      function isEmpty(s)


      {


		  return ((s == null) || (s.length == 0))


	  }





      /****************************************************************/





  function isWhitespace (s)


      {   var i;	               


           if (isEmpty(s)) return true;           


           for (i = 0; i < s.length; i++)


           {


              var c = s.charAt(i);


			  if (whitespace.indexOf(c) == -1) return false;


           }


           return true;


      }





	function validate(form2)


	{


		


	


	var name=document.form2.txtname.value;


	var email=document.form2.txtemail.value;


	var address=document.form2.txtaddress.value;


	var phone=document.form2.txtphone.value;


	var comments=document.form2.txtcomments.value;


	


	if(isWhitespace(name) == true)


	{


	alert("name field cannot be blank");


	document.form2.txtname.focus();


	return false;


	}


	if(isWhitespace(email) == true)


	{


	alert("e-mail field cannot be blank");


	document.form2.txtemail.focus();


	return false;


	}


	


	else{var res=val(email);if(res==false){document.form2.txtemail.focus();return false;}}





	


	if(isWhitespace(address) == true)


	{


	alert("Address field cannot be blank");


	document.form2.txtaddress.focus();


	return false;


	}


	if(isWhitespace(phone) == true)


	{


	alert("Phone cannot be blank");


	document.form2.txtphone.focus();


	return false;


	}


	else{var res=off_num(phone);if(res==false){document.form2.txtphone.focus();return false;}}


	if(isWhitespace(comments) == true)


	{


	alert("Comments field cannot be blank");


	document.form2.txtcomments.focus();


	return false;


	}





	return true;


	}





	function val(string) 


	{


	if (string.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/)== -1)


    {


    alert("Plese provide a valid email id.");


    return false;


    }


	}


	function off_num(string) 


	{


	


	if (isNaN(string))


    {


    alert("Plese provide a valid Phone Number.");


    return false;


    }


 


}