var modelessPopup;

function popup(url,width,height)
{
	if(width > 0 && height > 0)
	{
		var centered;
		x = (screen.availWidth - width) / 2;
		y = (screen.availHeight - height) / 2;
		centered =',width=' + width + ',height=' + height + ',left=' + x + ',top=' + y + ',scrollbars=yes,resizable=yes,status=yes';
	}else
	{
		centered = 'scrollbars=yes,resizable=yes,status=yes';
	}	
	var popup = window.open(url, '_blank', centered);
    	if (!popup.opener) popup.opener = self;
	popup.focus();
}

function openPopup(target, url,width,height)
{
	if(width > 0 && height > 0)
	{
		var centered;
		x = (screen.availWidth - width) / 2;
		y = (screen.availHeight - height) / 2;
		centered =',width=' + width + ',height=' + height + ',left=' + x + ',top=' + y + ',scrollbars=yes,resizable=yes,status=yes';
	}else
	{
		centered = 'scrollbars=yes,resizable=yes,status=yes';
	}	
	var popup = window.open(url, target, centered);
  	if (!popup.opener) popup.opener = self;
	popup.focus();
}


function confirm_action(url, message)
{
	if (confirm(message))
	{
		window.location=url
	}
}

function get_object(name)
{
	if (document.getElementById)
	{
		return document.getElementById(name);
 	}
 	else if (document.all)
	{
  		return document.all[name];
 	}
 	else if (document.layers)
	{
  		return document.layers[name];
	}
	return false;
}

function check_checkbox(id)
{
	if(check_box = get_object(id))
	{
		if (!check_box.disabled)
		{
			check_box.checked = !check_box.checked;
			if (check_box.onclick)
			{
				check_box.onclick();
			}
		}
	}
}

function select_radio(id)
{
	if(radio_but = get_object(id))
	{
		radio_but.checked = true;
		if (radio_but.onclick)
		{
			radio_but.onclick();
		}
	}
}


function getSelected(opt) 
{
	var selected = new Array();
	var index = 0;
	for (var i=0; i<opt.length;i++) 
	{
		if ((opt[i].selected) || (opt[i].checked)) 
		{
			index = selected.length;
			selected[index] = new Object;
			selected[index].value = opt[i].value;
			selected[index].index = i;
		}
	}
	return selected;
}

function copy_clip(copytext)
{

 	 if (window.clipboardData) 
   {
   
   // the IE-manier
   window.clipboardData.setData("Text", copytext);
   
   // waarschijnlijk niet de beste manier om Moz/NS te detecteren;
   // het is mij echter onbekend vanaf welke versie dit precies werkt:
   }
   else if (window.netscape) 
   { 
   
   // dit is belangrijk maar staat nergens duidelijk vermeld:
   // you have to sign the code to enable this, or see notes below 
   netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
   
   // maak een interface naar het clipboard
   var clip = Components.classes['@mozilla.org/widget/clipboard;1'].createInstance(Components.interfaces.nsIClipboard);
   if (!clip) return;
   
   // maak een transferable
   var trans = Components.classes['@mozilla.org/widget/transferable;1'].createInstance(Components.interfaces.nsITransferable);
   if (!trans) return;
   
   // specificeer wat voor soort data we op willen halen; text in dit geval
   trans.addDataFlavor('text/unicode');
   
   // om de data uit de transferable te halen hebben we 2 nieuwe objecten nodig   om het in op te slaan
   var str = new Object();
   var len = new Object();
   
   var str = Components.classes["@mozilla.org/supports-string;1"].createInstance(Components.interfaces.nsISupportsString);
   
   var copytext=copytext;
   
   str.data=copytext;
   
   trans.setTransferData("text/unicode",str,copytext.length*2);
   
   var clipid=Components.interfaces.nsIClipboard;
   
   if (!clip) return false;
   
   clip.setData(trans,null,clipid.kGlobalClipboard);
   
   }
   return false;
}

function y2k(number) { return (number < 1000) ? number + 1900 : number; }

function isDate (day,month,year) {
// checks if date passed is valid
// will accept dates in following format:
// isDate(dd,mm,ccyy), or
// isDate(dd,mm) - which defaults to the current year, or
// isDate(dd) - which defaults to the current month and year.
// Note, if passed the month must be between 1 and 12, and the
// year in ccyy format.

    var today = new Date();
    year = ((!year) ? y2k(today.getYear()):year);
    month = ((!month) ? today.getMonth():month-1);
    if (!day) return false
    var test = new Date(year,month,day);
    if ( (y2k(test.getYear()) == year) &&
         (month == test.getMonth()) &&
         (day == test.getDate()) )
        return true;
    else
        return false
}

function get_date(dateString, format)
{
	var datetimeArray = dateString.split(' ');
	var date = datetimeArray[0];
	var	dateArray = date.split('-');			

	if (format == "d-m-Y") {
		var day = dateArray[0];
		var month =dateArray[1];
		var year = dateArray[2];
	} else {
		var day = dateArray[1];
		var month = dateArray[0];
		var year = dateArray[2];
	}

	if(datetimeArray[1])
	{
		var timeArray = datetimeArray[1].split(':');
		var hour = timeArray[0];
		var min = timeArray[1];
	}else
	{
		var hour = 0;
		var min = 0;
	}
					
	var dateObj = new Date(year, month, day, hour, min);
	return dateObj;	
}