function validate_offer()
	{
		var error='';
		if(document.send_offer.lastname.value=='')
			error=error+'Uw achternaam is een verplicht veld\n';
		if(document.send_offer.email.value==''||!valid_email(document.send_offer.email.value))
			error=error+'Geen geldig emailadres ingevuld\n';
		if(document.send_offer.ctype[0].checked==false&&document.send_offer.ctype[1].checked==false)
			error=error+'Wilt u a.u.b. aangeven hoe wij het beste contact met u op kunnen nemen.\n';
		if (error=='')  return true;
				else	{
							alert(error);
							return false;
						}
	}
	
	function showDataOffer(subject) {
		shadowObj=document.getElementById("offer_transp");
	
		if(document.getElementById("third_left")!=undefined)
		{
			shadowObj.style.height=document.getElementById("third_left").offsetHeight;
		}
	
	
	
		shadowObj=document.getElementById("offer_transp");
		dataObj=document.getElementById("offer_data");
		shadowObj.style.visibility='visible';
		dataObj.style.visibility='visible';
		var htmlCode='';
		htmlCode=htmlCode+'<div id="inner_data_offer">'; 
		htmlCode=htmlCode+'<div id="offer_title">Offerte aanvragen </div>';
		htmlCode=htmlCode+'<div id="offer_text1">Bij deze vraagt u een vrijblijvende offerte aan voor:<br><span id="offer_text_selected">'+subject+'</span></div>';
		htmlCode=htmlCode+'<div id="offer_text2">Hiervoor hebben wij een aantal gegevens van u nodig.<br> Als u deze invult, nemen wij z.s.m. contact met u op</div>';
		htmlCode=htmlCode+'<input type="hidden" value="'+subject+'" name="issue">';
		
		htmlCode=htmlCode+'<div id="close_button_offer"><a href="#" onClick="JavaScript:hideDataOffer();return false;"  id="offer_text_selected">sluiten <img src="images/blocks_green.gif" border="0"></a></div>';
		htmlCode=htmlCode+'<div id="offer_form_container">';
		htmlCode=htmlCode+'<p><span id="offer_cell_left_bullet">Voorletter(s):</span><input type="text" id="offer_input" name="firstname" ><br>';
		htmlCode=htmlCode+'<span id="offer_cell_left_bullet">Achternaam:</span><input type="text" id="offer_input"  name="lastname"><br>';
		htmlCode=htmlCode+'</p><p><span id="offer_cell_left_bullet">Telefoon:</span><input type="text" id="offer_input"  name="phone"><br>';
		htmlCode=htmlCode+'<span id="offer_cell_left_bullet">E-mail:</span><input type="text" id="offer_input"  name="email"><br>';
		htmlCode=htmlCode+'<span id="offer_cell_left_bullet">Contact per:</span><input  type="radio" id="offer_radio" name="ctype" value="t" >';
		htmlCode=htmlCode+'&nbsp;Telefoon&nbsp;<input  type="radio" id="offer_radio" name="ctype" value="e" >&nbsp;E-mail</p><p>';
		htmlCode=htmlCode+'<span id="offer_cell_left_bullet">Opmerking:</span><textarea  id="offer_textarea" name="observation">Eventuele opmerkingen</textarea>';
		htmlCode=htmlCode+'<div id="send_button_offer"><a href="#" onClick="if(validate_offer()){document.send_offer.submit();}" class="blink">verzenden <img src="images/blocks_green.gif" border="0"></a></div>';
		htmlCode=htmlCode+'</div>';
		htmlCode=htmlCode+'</div>';
		dataObj.innerHTML=htmlCode;
		return false;
	}

	function hideDataOffer() {
		shadowObj=document.getElementById("offer_transp");
		dataObj=document.getElementById("offer_data");
		shadowObj.style.visibility='hidden';
		dataObj.style.visibility='hidden';
		return false;
	}
	//-->