var popupWindow=null;
function popup(mypage,myname,w,h,pos,infocus){
	if (pos == 'random'){
		LeftPosition=(screen.width)?Math.floor(Math.random()*(screen.width-w)):100;TopPosition=(screen.height)?Math.floor(Math.random()*((screen.height-h)-75)):100;
	}else{
		LeftPosition=(screen.width)?(screen.width-w)/2:100;TopPosition=(screen.height)?(screen.height-h)/2:100;
	}
	
	settings='width='+ w + ',height='+ h + ',top=' + TopPosition + ',left=' + LeftPosition + ',scrollbars=yes,location=no,directories=no,status=no,menubar=no,toolbar=no,resizable=yes';popupWindow=window.open('',myname,settings);
	if(infocus=='front'){popupWindow.focus();popupWindow.location=mypage;}
	if(infocus=='back'){popupWindow.blur();popupWindow.location=mypage;popupWindow.blur();}
}

function popup_with_nav(mypage,myname,w,h,pos,infocus){
	if (pos == 'random'){
		LeftPosition=(screen.width)?Math.floor(Math.random()*(screen.width-w)):100;TopPosition=(screen.height)?Math.floor(Math.random()*((screen.height-h)-75)):100;
	}else{
		LeftPosition=(screen.width)?(screen.width-w)/2:100;TopPosition=(screen.height)?(screen.height-h)/2:100;
	}
	
	settings='width='+ w + ',height='+ h + ',top=' + TopPosition + ',left=' + LeftPosition + ',scrollbars=yes,location=yes,directories=no,status=no,menubar=yes,toolbar=yes,resizable=yes';popupWindow=window.open('',myname,settings);
	if(infocus=='front'){popupWindow.focus();popupWindow.location=mypage;}
	if(infocus=='back'){popupWindow.blur();popupWindow.location=mypage;popupWindow.blur();}
}

var allSelected = false;
function SelectUnSelectAll(my_form, field_name) {
	allSelected = !allSelected;
	len = my_form.elements.length;
	var index = 0;
	
	for( index=0; index < len; index++ ) {
		my_form.elements[index].checked = allSelected;
	}
}