var new_fieldname = ""
function check(form,x)
{
	var message = ""
	var more_message = ""
	var showmsg = "no"
	{
		x = x - 1
		for (var i = 0; i <= x; i++)
			{
	 			var messenger = form.elements[i].name
				messenger = messenger.substring(0, 2)
				var fieldname = form.elements[i].name
				fieldname = fieldname.substring(2)
					{
						if (messenger == "r_")
							{
								more_message = r_check(form,x,fieldname,i)
							}
						else if (messenger == "i_")
							{
								more_message = i_check(form,x,fieldname,i)
							}
						else if (messenger == "e_")
								{
									more_message = e_check(form,x,fieldname,i)
								}			
							 if (more_message != "")
	        {
									if (message == "")
										{
											message = more_message
											more_message=""
										}
									else
										{
			        message = message + "\n" + more_message
											more_message=""
										}
	        }
						if (message > "")
								{
										showmsg = "yes"
								}													
						}	
				}
		if (showmsg == "yes")
			{
				alert("Voor een juiste verwerking van de gegevens en verzending van het\nformulier vragen wij u verschillende opties op het formulier in te vullen:\n\n" + message + "\n\nCorrigeer het formulier en verzendt het opnieuw.")
			}
		else
			{
				form.submit()
			}
		}
}	
function r_check(form,x,fieldname,i)
	{
		var msg_addition = ""
		new_fieldname = fieldname
		for (var y = 0; y <= x; y++)
			{
				if ((form.elements[y].type == "radio" || form.elements[y].type == "checkbox") && form.elements[y].name == new_fieldname && form.elements[y].checked == true)
					{
							msg_addition = ""
							break
					}
				else if ((form.elements[y].type == "radio" || form.elements[y].type == "checkbox") && form.elements[y].name == new_fieldname && form.elements[y].checked == false)
					{
						msg_addition = form.elements[i].value
					}
			else if (form.elements[y].type == "select-one")
							{
								var l = form.elements[y].selectedIndex
								if (form.elements[y].name == fieldname && form.elements[y].options[l].value != "")
									{
										msg_addition = ""
										break
									}
								else if (form.elements[y].name == fieldname && form.elements[y].options[l].value == "")
									{
										msg_addition = form.elements[i].value
									}
								}
		 else if (form.elements[y].name == fieldname && form.elements[y].value == "" && form.elements[y].type != "radio" && form.elements[y].type != "checkbox" && form.elements[y].type != "select-one")
							{
								msg_addition = form.elements[i].value
								break
							}
				else if (form.elements[y].name == fieldname && form.elements[y].value != "" && form.elements[y].type != "radio" && form.elements[y].type != "checkbox" && form.elements[y].type != "select-one")
							{
								msg_addition = ""
							}	
				}
			return(msg_addition)
		}
function i_check(form,x,fieldname,i)
	{
		for (var y = 0; y <= x; y++)
			{
				if (form.elements[y].name == fieldname)
				break
			}						
	var msg_addition = ""
	var decimal = ""
	inputStr = form.elements[y].value.toString()
	if (inputStr == "")
		{
			msg_addition = form.elements[i].value
		}
	else
		{
			for (var c = 0; c < inputStr.length; c++)
				{
					var oneChar = inputStr.charAt(c)
					if (c == 0 && oneChar == "-" || oneChar == "."  && decimal == "")
							{
								if (oneChar == ".")
									{
										decimal = "yes"
									}
								continue
							}
								if (oneChar < "0" || oneChar > "9")
									{
										msg_addition = form.elements[i].value
									}
				}
		}
		return(msg_addition)
	}	
	function e_check(form,x,fieldname,i)
	{
		for (var y = 0; y <= x; y++)
			{
				if (form.elements[y].name == fieldname)
				break
			}						
	var msg_addition = ""
	ctrl = form.EMAIL;
	period = ".";
                if (ctrl.value == "" || ctrl.value.indexOf ('@', 0) < 2)
                        error = 1;
																else
                  {
	                   test = ctrl.value.indexOf('.', ctrl.value.indexOf ('@', 0))
										 if (test != -1)
																					{
																						error = 0;
																					}
																				else
																				{
	                    	 error=1;
																				}
                  }
                if (error == 1)
																	{
               				msg_addition = form.elements[i].value
																	}
                else
                 {
								 		new_length = ctrl.value.length - test
              if (new_length == 4 || new_length == 3 || (new_length >= 5 && ctrl.value.indexOf ('.', (test+1)) != -1))
																						{
																							msg_addition = ""
																						}
																					else
																							msg_addition = form.elements[i].value;
																	}
	return(msg_addition)
	}	
	function isInteger(sDate)
	{
		var new_msg = "true"
		inputStr = sDate.toString()
		for (var i = 0; i < inputStr.length; i++)
			{
			var oneChar = inputStr.charAt(i)			
			if ((oneChar < "0" || oneChar > "9") && oneChar != "/")
					{
						new_msg = "false"
					}
			}
		return (new_msg)
	}
	function doall()
	{
	var code = 0
	for (var a = 0; a < test.length; a++)
		{
		var each_char = test.charAt(a)
		var x = asc(each_char)
		code += x
		}
	return (code)
	}
	function asc(each_char)
		{
		var n = 0
			var char_str = charSetStr()
			for (i = 0; i < char_str.length; i++)
				{
					if (each_char == char_str.substring(i, i+1))
						{
							break
						}
				}
			return i + 32
		}
		function charSetStr()
			{
				var str
 			str = ' !"#$%&' + "'" + '()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~'
				return str
			}