function validate()
{
	
	if(document.contact_us.f_name.value =="")
	{
		alert("Please enter first name.");
		return false;
	}
	
	if(document.contact_us.last_name.value =="")
	{
		alert("Please enter last name.");
		return false;
	}
	
	if(document.contact_us.email.value =="")
	{
		alert("Please enter email address.");
		return false;
	}
	
	if(document.contact_us.email.value !="")
	{
		 
		 var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   		 var address = document.forms['contact_us'].elements['email'].value;
   		 if(reg.test(address) == false)
		 {
      		alert('Invalid Email Address');
     	 	return false;
		 }
	}
	
	if(document.contact_us.phone.value =="")
	{
		alert("Please enter phone number.");
		return false;
	}
	
	if(document.contact_us.txt_msg.value =="")
	{
		alert("Please enter the message.");
		return false;
	}
	
	if(!document.contact_us.chk_term.checked)
	{ 
		alert("Please select the terms and conditions.");
		return false;
 	}
	
	if(confirm("Are you sure to send information."))
	{
		return true;
	}	
	else
	{
	 	return false;
	}
	
	
}