function doc(docID) {
    return document.getElementById(docID);    
}
function _zoeken_box(target) {
    value = (target.value)=='Zoeken' ? '':target.value;
    value = (target.value)=='' ? 'Zoeken':value;

    target.value = value;
}

function toggle( target ) {
    if( doc( target ).style.display == 'block') {
        return doc( target ).style.display = 'none';    
    } else {
        return doc( target ).style.display = 'block';        
    }
}

function toggle_zoeken( mThis, target ) {
    if( doc( target ).style.display == 'block') {
        doc( mThis ).style.backgroundPosition = 'left bottom';
        doc( target ).style.display = 'none';    
    } else {
        doc( mThis ).style.backgroundPosition = 'left top';
        doc( target ).style.display = 'block';        
    }
}

function css_browser_selector(u){var ua=u.toLowerCase(),is=function(t){return ua.indexOf(t)>-1},g='gecko',w='webkit',s='safari',o='opera',m='mobile',h=document.documentElement,b=[(!(/opera|webtv/i.test(ua))&&/msie\s(\d)/.test(ua))?('ie ie'+RegExp.$1):is('firefox/2')?g+' ff2':is('firefox/3.5')?g+' ff3 ff3_5':is('firefox/3.6')?g+' ff3 ff3_6':is('firefox/3')?g+' ff3':is('gecko/')?g:is('opera')?o+(/version\/(\d+)/.test(ua)?' '+o+RegExp.$1:(/opera(\s|\/)(\d+)/.test(ua)?' '+o+RegExp.$2:'')):is('konqueror')?'konqueror':is('blackberry')?m+' blackberry':is('android')?m+' android':is('chrome')?w+' chrome':is('iron')?w+' iron':is('applewebkit/')?w+' '+s+(/version\/(\d+)/.test(ua)?' '+s+RegExp.$1:''):is('mozilla/')?g:'',is('j2me')?m+' j2me':is('iphone')?m+' iphone':is('ipod')?m+' ipod':is('ipad')?m+' ipad':is('mac')?'mac':is('darwin')?'mac':is('webtv')?'webtv':is('win')?'win'+(is('windows nt 6.0')?' vista':''):is('freebsd')?'freebsd':(is('x11')||is('linux'))?'linux':'','js']; c = b.join(' '); h.className += ' '+c; return c;}; css_browser_selector(navigator.userAgent);

function strpos (haystack, needle, offset) {
    var i = (haystack + '').indexOf(needle, (offset || 0));
    return i === -1 ? false : true;
}

function externalLinks() { 
 if (!document.getElementsByTagName) return; 
 var anchors = document.getElementsByTagName("a"); 
 for (var i=0; i<anchors.length; i++) { 
   var anchor = anchors[i]; 
   if (anchor.getAttribute("href") && 
      strpos(anchor.getAttribute("rel"),"external"))
     anchor.target = "_blank"; 
 } 
}