function openpage( url, width, height, scrollbars )
{ 
    name   = "";

	if( scrollbars == null ) scrollbars = "0" 
 
	str  = ""; 
	str += "resizable=0,"; 
	str += "scrollbars=" + scrollbars + ","; 
	str += "width=" + width + ","; 
	str += "height=" + height + ","; 
 
	if ( window.screen ) { 
		var ah = screen.availHeight - 30; 
		var aw = screen.availWidth - 10; 
 
		var xc = ( aw - width ) / 2; 
		var yc = ( ah - height ) / 2; 
 
		str += ",left=" + xc + ",screenX=" + xc; 
		str += ",top=" + yc + ",screenY=" + yc; 
	} 
	window.open( url, name, str ); 
}

//Makes sure that the entered value is a number
// use via onKeyPress="checkNum()" on the textbox
function checkNum()
{
	var carCode = event.keyCode;
	if ((carCode < 48) || (carCode > 57))
		{
		alert('Please enter only numbers.');
		event.cancelBubble = true
		event.returnValue = false;
		}
}

function stripSpecialChars(p_object) 
{ 
	p_object.value = p_object.value.replace(/,/g, ' ');
	p_object.value = p_object.value.replace(/\'/g, '');
	p_object.value = p_object.value.replace(/\"/g, '');
}

function stripAlphaChars(p_object) 
{ 
	p_object.value = p_object.value.replace(/[^0-9]/g, '');
}

//Disable right click script III- By Renigade (renigade@mediaone.net)
//For full source code, visit http://www.dynamicdrive.com

var message="";
///////////////////////////////////
function clickIE() {if (document.all) {(message);return false;}}
function clickNS(e)
{
	if (document.layers||(document.getElementById&&!document.all))
		{
		if (e.which==2||e.which==3) {(message);return false;}
		}
}

if (document.layers) 
	{document.captureEvents(Event.MOUSEDOWN);document.onmousedown=clickNS;}
else
	{document.onmouseup=clickNS;document.oncontextmenu=clickIE;}

document.oncontextmenu=new Function("return false")

/*
var mymessage = "";

function rtclickcheck(keyp)
{
  if (navigator.appName == "Netscape" && keyp.which == 3) {alert(mymessage);  return false;  }
  if (navigator.appVersion.indexOf("MSIE") != -1 && event.button == 2) {alert(mymessage); return false;}
}
  
document.onmousedown = rtclickcheck
*/

function hide(layer_off)
{
  var is_ns4 = navigator.appName.indexOf('Netscape', 0) != -1 && !document.getElementById;

  var is_ns6 = navigator.appName.indexOf('Netscape', 0) != -1 && document.getElementById;

  if(is_ns4)
    document.layers[layer_off].visibility ='hide'
  else if(is_ns6) 
    document.getElementById(layer_off).style.display = 'none';
  else if(document.all)
    document.all(layer_off).style.display ='none'
}

function showhide(layer_on, layer_off)
{
  var is_ns4 = navigator.appName.indexOf('Netscape', 0) != -1 && !document.getElementById;

  var is_ns6 = navigator.appName.indexOf('Netscape', 0) != -1 && document.getElementById;

  if(is_ns4)
	{
    document.layers[layer_on].visibility ='show'
    document.layers[layer_off].visibility ='hide'
	}
  else if(is_ns6) 
	{
    document.getElementById(layer_on).style.display = 'block';
    document.getElementById(layer_off).style.display = 'none';
	}
  else if(document.all)
	{
    document.all(layer_on).style.display ='block'
    document.all(layer_off).style.display ='none'
	}
}