function delivery_validation() {
	
	var err="";



	if(document.form1.ContactPerson.value=="") {
		err+="Please enter contact person.\n";
	}
	else
	{
		err+="";
	}
	
	if(document.form1.Tel.value=="") {
		err+="Please enter tel number.\n";
	}
	else
	{
		err+="";
	}
	
	
	var e=document.form1.EmailAddress.value;
	if(e=="")
	{
    	err+="Please enter your email address.\n";
	}
	else
 	{
 		var e_pattern=/\b[a-zA-Z0-9._%-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}\b/;
  		var emailcheck=e_pattern.test(e);
   		if(emailcheck==false)
		{
			err+="Please enter a valid email address.\n";
		}
		else if(emailcheck==true) {
			err+="";
		}
	}
	
	
	



	if(err=="")
		return true;

	else
	{
		window.alert(err);
		return false;
	}

}