function isEmpty(str)
{
 for(var intLoop=0; intLoop<str.length; intLoop++)
   if(str.charAt(intLoop)!=" ")
  return false;

 return true;
}

function validform(){
		
	if (isEmpty(document.contactform.name.value)){
		alert ('Please specify a name.');
		document.contactform.name.focus();
		return false;
	}
	
	if (isEmpty(document.contactform.email.value)){
		alert("Please specify your Email address.");
		document.contactform.email.focus();
		return false;
	} else if ( !isValidEmail(document.contactform.email.value))
	{
		alert("Please use valid Email address.");
		return false;
	}
		
	if (isEmpty(document.contactform.company.value)){
		alert ('Please specify a company.');
		document.contactform.company.focus();
		return false;
	}
	
	if (isEmpty(document.contactform.add1.value)){
		alert ('Please specify your address.');
		document.contactform.add1.focus();
		return false;
	}
	
	if (isEmpty(document.contactform.phnum.value)){
		alert ('Please specify your phone number.');
		document.contactform.phnum.focus();
		return false;
	}
	return true;
}

function isValidEmail(myEmail)
{
	if (myEmail.match(/\w+((-\w+)|(\.\w+)|(_\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z]{2,5}/) )
		return true;
	else
		return false;
}