var url = getURLParam("channel");
if(url==''){
	url = 'tv';
}

var rtvPart = url.substr(0,2);
var oldDiv = ''; 
var oldDivBG = '';
function SwitchColumnRTV(basecolumn,contentcolumn) {		document.getElementById(basecolumn).innerHTML = document.getElementById(contentcolumn).innerHTML;

		if(oldDiv!=''){
			//alert("change background of: "+oldDiv);
			document.getElementById(oldDiv).style.backgroundColor = '';
		}
		switch(contentcolumn)
		{
			case "tvmenu":
  			 oldDiv = 'tv';
  			break    
			case "radiomenu":
 			 oldDiv = 'radio';
  			break
  			case "digitaalmenu":
 			 oldDiv = 'digitaal';
  			break
  			case "regionaalmenu":
 			 oldDiv = 'regionaal';
  			break
  			default:
  			 oldDiv = 'none';
  		}
		if(oldDiv !='none'){
		document.getElementById(oldDiv).style.backgroundColor = "#ffffff";

		//oldDivBG = document.getElementById(oldDiv).style.backgroundColor;
		}		
}

function getURLParam(strParamName){
  var strReturn = "";
  var strHref = window.location.href;
  if ( strHref.indexOf("?") > -1 ){
    var strQueryString = strHref.substr(strHref.indexOf("?")).toLowerCase();
    var aQueryString = strQueryString.split("&");
    for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){
      if (
aQueryString[iParam].indexOf(strParamName.toLowerCase() + "=") > -1 ){
        var aParam = aQueryString[iParam].split("=");
        strReturn = aParam[1];
        break;
      }
    }
  }
  return unescape(strReturn);
}