function disable_element(inputid,checkbx)
{var textfld=document.getElementById(inputid);if(checkbx.checked)
textfld.disabled=false;if(!checkbx.checked)
textfld.disabled=true;}
function add_focus(inputid)
{var textfld=document.getElementById(inputid);if(!textfld.disabled)
{document.getElementById(inputid).focus();}}
function empty_field(field,standaard)
{var inhoud=document.getElementById(field);if(inhoud.value==standaard)
{inhoud.value="";}}
function checkCadeauWijzerVelden()
{if(document.getElementById('cat').value=='0')
{alert('U dient een categorie te selecteren voor u kunt zoeken');return false;}
else if(document.getElementById('budget').value=='0')
{alert('U dient een budget te selecteren voordat u kunt zoeken');return false;}
else
return true;}
function fill_field(field,input)
{var veld=document.getElementById(field);if(veld.value=="")
veld.value=input;}
function update_prijs(we)
{getal=5.775993992
getal=Math.round(getal*10)/10;alert(getal);}
function bevestig(bericht)
{if(bericht==''||typeof(window.opera)!='undefined')
{return true;}
return confirm(bericht);}
function b_alert(plaatje,titel,prijs)
{alertwidth=400;screenwidth=window.screen.availWidth;screenheight=window.screen.availHeight;screenwidth=(screenwidth/2);screenheight=(screenheight/2)-50;x_start=(screenwidth-(alertwidth/2));y_start=(screenheight-200);document.getElementById('b_alert').style.width=alertwidth;document.getElementById('b_alert').style.top=y_start;document.getElementById('b_alert').style.left=x_start;document.getElementById('b_alert_text').innerHTML='<table width="100%"><td width="30%"><img src="'+plaatje+'" alt="" border=0></td><td width="70%" bgcolor="#f6f6f6" valign="top"><b> '+titel+' </b><p> <span class="prijs">&euro; '+prijs+'</span></td><tr><td colspan="2" bgcolor="#EAEAEA"></td></table>';}
function hide_b_alert()
{document.getElementById('b_alert').style.width=0;document.getElementById('b_alert').style.top=-5000;document.getElementById('b_alert').style.left=-5000;document.getElementById('b_alert_text').innerHTML="";}
function verander_class(id,naar)
{document.getElementById(id).className=naar;}
function check_clicked(id)
{document.getElementById(id).checked=true;}
function changeClass(id,to)
{document.getElementById(id).className=to;}
function openPopup(url,AAttr)
{AWindow=window.open(url,window.name+"X",AAttr);if(parseInt(navigator.appVersion)>=3)
AWindow.focus();return;}