//*******************************************
//   Copyright 2011
//*******************************************


function wijzigCss(theClass,element,value) {

	var cssRules;
	var added = false;

	for (var S = 0; S < document.styleSheets.length; S++){

		if (document.styleSheets[S]['rules']) {
			cssRules = 'rules';
		} else if (document.styleSheets[S]['cssRules']) {
			cssRules = 'cssRules';
		} else {
			// geen rules gevonden... browser onbekend
		} 

		for (var R = 0; R < document.styleSheets[S][cssRules].length; R++) {
			if (document.styleSheets[S][cssRules][R].selectorText == theClass) {
				if(document.styleSheets[S][cssRules][R].style[element]){
					document.styleSheets[S][cssRules][R].style[element] = value;
					added=true;
					break;
				}
			}
		}

		if(!added){
			try{ document.styleSheets[S].insertRule(theClass+' { '+element+': '+value+'; }',document.styleSheets[S][cssRules].length); } 
			catch(err){ try{document.styleSheets[S].addRule(theClass,element+': '+value+';'); } catch(err){} }
	}
}

}



/* Om lege images te verbergen */
function HideEmptyImages()
{
var regex = new RegExp("(shownoimg)\.gif$");
for (var i=0; i < document.images.length; i++)
if (regex.test(document.images[i].src))
document.images[i].style.display = "none";
}