function showorhide(value, collapse_divs) {
  if (collapse_divs != undefined ) {
	  arr_collapse = collapse_divs.split(",");
	  for(var i = 0;i < arr_collapse.length;i++)  {
		  document.getElementById(arr_collapse[i]).style.display = 'none';
	  }
  }

  if (document.getElementById(value).style.display == 'none') {
    document.getElementById(value).style.display = 'block';
  } else {
    document.getElementById(value).style.display = 'none';
  }
}

function showPop(value, collapse_divs) {
  if (collapse_divs != undefined ) {
	  arr_collapse = collapse_divs.split(",");
	  for(var i = 0;i < arr_collapse.length;i++)  {
		  document.getElementById(arr_collapse[i]).style.display = 'none';
	  }
  }

  if (value != undefined ) {
	  if (document.getElementById(value).style.display == 'none') {
	    document.getElementById(value).style.display = 'block';
	  } else {
	    document.getElementById(value).style.display = 'none';
	  }
  }
}

function showtab(value, collapse_divs) {
  if (collapse_divs != undefined ) {
	  arr_collapse = collapse_divs.split(",");
	  for(var i = 0;i < arr_collapse.length;i++)  {
		  document.getElementById(arr_collapse[i]).style.display = 'none';
	  }
  }

  if (document.getElementById(value).style.display == 'none') {
    document.getElementById(value).style.display = 'block';
  }
}

function toggle_photo(element, url) {
	document.getElementById(element).src = url;
}

function check_min_max_items(element, min_items, max_items) {
	// Checking if at least one is selected. Or not.
	var total = 0;
	var checks = document.getElementsByName(element)
	var msg = "";
	for(i=0; i<checks.length; i++) {
		if(checks[i].checked == true) {
			total += 1;
		}
	}

	if ((min_items == 0 || total >= min_items) && (max_items == 0 || total <= max_items)) {
		return true;
	} else {
		if (min_items == max_items) {
			alert("Selecteer " + min_items + " item(s).");
			return false;
		} else {
			if (min_items == 0 && max_items != 0) {
				msg = "Selecteer maximaal " + max_items + " item(s).";
			} else if (max_items == 0 && min_items != 0) {
				msg = "Selecteer minimaal " + min_items + " item(s)";
			} else {
				msg = "Selecteer minimaal " + min_items + " en maximaal " + max_items + " items";
			}
			alert(msg);
			return false;
		}
	}
}