function toggleFltr()
	{

		var f = document.filterPhotographers;

    var i;
    for (i=0;i<f.ddl.length;i++){
       if (f.ddl[i].checked)
	   {
          break;
	   }
    }

			if(f.ddl[i].value == "t")
			{
				document.getElementById('CollabTematica').style.display = 'inline';
				document.getElementById('CollabTematica').disabled = false;
				document.getElementById('CollabPoblacion').style.display = 'none';
				document.getElementById('CollabPoblacion').disabled = true;
			}else if(f.ddl[i].value == "p"){
				document.getElementById('CollabPoblacion').style.display = 'inline';
				document.getElementById('CollabPoblacion').disabled = false;
				document.getElementById('CollabTematica').style.display = 'none';
				document.getElementById('CollabTematica').disabled = true;
			}

	}