function IsNumeric(sText){

   var ValidChars = "0123456789.";
   var IsNumber=true;
   var Char;

    try{

    for (i = 0; i < sText.length && IsNumber == true; i++){ 
        Char = sText.charAt(i); 
        if (ValidChars.indexOf(Char) == -1){IsNumber = false;}
    }

    return IsNumber;
   
   }catch(ex){return false;}
   
}

function request(name){return(Request(name));}
function Request(name)
{
  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];
}