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 IsNumeric(strString)
   //  check for valid numeric strings	
   {
   var strValidChars = "0123456789.-";
   var strChar;
   var blnResult = true;

   if (strString.length == 0) return false;

   //  test strString consists of valid characters listed above
   for (i = 0; i < strString.length && blnResult == true; i++)
      {
      strChar = strString.charAt(i);
      if (strValidChars.indexOf(strChar) == -1)
         {
         blnResult = false;
         }
      }
   return blnResult;
}

function msie_replace_png_imgs() { 
	if (ie_version() > 6) return;
	var i, elements; 
	
	elements = document.getElementsByTagName("img"); 
	for (i = 0; i < elements.length; i++) { 
		var img = elements[i]; 
		if (img.src.toLowerCase().search(/\.png$/) < 0) continue; 
		
		img.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + img.src + "', sizingMethod='image')"; 
		img.src = "/images/spacer.gif"; 
	} 
	
	elements = document.getElementsByTagName("input"); 
	for (i = 0; i < elements.length; i++) { 
		var input = elements[i]; 
		if (input.getAttribute("type") != "image") continue; 
		if (input.getAttribute("src").toLowerCase().search(/\.png$/) < 0) 
			continue; 
			
		input.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + input.src + "', sizingMethod='image')"; 
		input.src = "/images/spacer.gif"; 
	} 
} 

function ie_version() {
	if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)){ //test for MSIE x.x;
	 var ieversion=new Number(RegExp.$1) // capture x.x portion and store as a number
	 
	 if (ieversion>=8)
	  return 8;
	 else if (ieversion>=7)
	  return 7;
	 else if (ieversion>=6)
	  return 6;
	 else if (ieversion>=5)
	  return 5;
	  
	}
	
	return 1000; 
}