function formatCurrency(num) 
{
	num = num.toString().replace(/\$|\,/g,'');
	if(isNaN(num))
	num = "0";
	sign = (num == (num = Math.abs(num)));
	num = Math.floor(num*100+0.50000000001);
	cents = num%100;
	num = Math.floor(num/100).toString();
	if(cents<10)
	cents = "0" + cents;
	for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
		num = num.substring(0,num.length-(4*i+3))+','+
	
	num.substring(num.length-(4*i+3));
	return (((sign)?'':'-') + '$' + num + '.' + cents);
}

function getQueryString( name ) 
{ 
  //used to retrieve querystring parameter value
  name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]"); 
  var regexS = "[\\?&]"+name+"=([^&#]*)"; 
  var regex = new RegExp( regexS ); 
  var results = regex.exec( window.location.href ); 
  if( results == null ) 
    return ""; 
  else 
    return results[1]; 
}


function createCookie(name,value,days) {
	if (days!=null) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
	
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) {
		      
		    return c.substring(nameEQ.length,c.length);
	    }
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}