function reg_check_input()
	{
		var form_id=new Array("first_name", "last_name", "company", "title", "office_no", "mobile_no", "email", "pa_first_name", "pa_last_name", "pa_contact_no", "pa_email");
        var form_full=new Array("First Name", "Last Name", "Company Name", "Title", "Office No.", "Mobile No.", "Email Address", "Personal Assistant's First Name", "Personal Assistant's Last Name", "Personal Assistant's Contact No.", "Personal Assistant's Email");
		var filter  = /^([a-zA-Z0-9_\.\-\])+([a-zA-Z0-9])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
		var form_id_counter = count(form_id);
		var j = 0;
		for(i=0; i<=form_id_counter; i++)
			{
				b = eval("document.reg_form." + form_id[i]);
				if(form_id[i] == 'title' || form_id[i] == 'pa_first_name' || form_id[i] == 'pa_last_name' || form_id[i] == 'pa_contact_no' || (form_id[i] == 'pa_email' && b.value.length == 0))
					{}
				else
					{
						if(b.value.length == 0)
							{
								alert("Sorry, Please Input '" + form_full[i] + "'!");
								b.focus();
								return false;
							}
						else
							{
								if(form_id[i] == "email" || (form_id[i] == "pa_email" && b.value.length > 0))
									{
										if(!filter.test(b.value))
											{
												alert("Invalid '" + form_full[i] + "' Format!");
												b.focus();
												return false;
											}
									}
							}
					}
			}
	}