/*
WM_changeVisibility()
Changes whether a layer is visible or hidden.

Source: Webmonkey Code Library
(http://www.hotwired.com/webmonkey/javascript/code_library/)

Author: Nadav Savio
Author Email: nadav@wired.com

usage: WM_changeVisibility('targetLayer1',[visible|hidden|toggle],'targetLayer2',[visible|hidden|toggle],...,'targetLayerN',[visible|hidden|toggle])

*/

// set hidden/visible vars for Netscape 4 compatibility
if (document.layers) {
  var hidden = "hide";
  var visible = "show";
} else {
  var hidden = "hidden";
  var visible = "visible";
}
var toggle = "toggle";

function WM_changeVisibility() {
  if (document.layers || document.all) {
    var inc, endInc=arguments.length;
    // run through the args (objects) and set the visibility of each
    for (inc=0; inc<endInc; inc+=2) {
      // get a good object reference
      var daObj = WM_checkIn(arguments[inc]);
      if (arguments[inc+1] == hidden) {
        // hide the object
        daObj.visibility = hidden;
      } else if (arguments[inc+1] == visible) {
        // show the object
        daObj.visibility = visible;
      } else if (arguments[inc+1] == toggle) {
        // toggle the object's visibility
        if (daObj.visibility == visible) {
          daObj.visibility = hidden;
        } else if (daObj.visibility == hidden) {
          daObj.visibility = visible;
        }
      }
    }
  }
}

function goHelp(topic) {
   var help = window.open('help.php?tpc=' + topic,'help','width=396,height=520,resizable=yes,status=no,scrollbars=yes','replace=true');
   if (window.focus) help.focus();

}

function doConfirm(form, action) {
	
	var itemSelected = false;

	for (i = 0; i < form.elements.length; i++) {
		if (form.elements[i].type == 'checkbox' &&
			form.elements[i].checked) {
			itemSelected = true;
			break;
		}
	}

	if (itemSelected) {
		if (action == 'delete') {
			if (confirm('Do you want to delete the selected items?')) {
				form.action = 'http://zircon.mcli.dist.maricopa.edu/mlx/delete_packages.php';
				form.submit();
			}
		}
		else if (action.length > 0) {
			form.submit();
		}
		else {
			alert('No action was selected!');
		}
	}
	else {
		alert('No items are selected!');
		form.todo.selectedIndex = 0;
	}

}

function WM_checkIn(id) {

/*
WM_checkIn()
Takes the ID of a positioned HTML element and returns an object reference.

Source: Webmonkey Code Library
(http://www.hotwired.com/webmonkey/javascript/code_library/)

Author: Taylor
Author Email: taylor@wired.com
Author URL: http://www.taylor.org/

Usage: WM_checkIn('id')
*/

  // This function checks for DOM strategy, then 
  // returns an object reference.
  if (document.all) {
    return document.all[id].style;
  } else if(document.layers) {
    return document.layers[id];
  }
}