function showBlock(tekst2_kolom1_kunstenaarId)        {
          document.getElementById(tekst2_kolom1_kunstenaarId).style.display = "block";
					  
}
  
function hideBlock(tekst2_kolom1_kunstenaarId)  
        {  
          document.getElementById(tekst2_kolom1_kunstenaarId).style.display = "none";
					  
  
	}

function setCookie(c_name,value,expiredays)
	{
		var exdate=new Date();
		exdate.setDate(exdate.getDate()+expiredays);
		document.cookie=c_name+ "=" +escape(value)+
			((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
	}
	
function showText() {
		showBlock('tekst2_kolom1_kunstenaar2');
		hideBlock('tekst2_kolom1_kunstenaar1');
		setCookie('kunstenaar_show_text', 1);
	}

function hideText() {
		hideBlock('tekst2_kolom1_kunstenaar2');
		showBlock('tekst2_kolom1_kunstenaar1');
		setCookie('kunstenaar_show_text', 0);
	}
	
function show_subnav(id) {
    document.getElementById('subnav'+id).style.display = 'block';
	}

function hide_subnav(id) {
    document.getElementById(id).style.display = 'none';
	}
	
function hide_all_subnav() {
		elms = document.getElementsByTagName('div');
		for(var i=0;i<elms.length;i++)
		  if (elms[i].id.indexOf('subnav') != -1)
		    hide_subnav(elms[i].id);
	}