function isNumeric(sText)

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

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



function hideDiv(id){
	if(document.getElementById) // DOM3 = IE5, NS6
		document.getElementById(id).style.display = 'none';
	else{
    if(document.layers) // Netscape 4
      document.id.display = 'none';
    else // IE 4
      document.all.id.style.display = 'none';
  }
}

function showDiv(id){
	if(document.getElementById) // DOM3 = IE5, NS6
		document.getElementById(id).style.display = 'block';
	else{
		if(document.layers) // Netscape 4
			document.id.display = 'block';
		else // IE 4
			document.all.id.style.display = 'block';
	}
}


function showSection(id) {
	var el = document.getElementById(id);

	with( el.style ) {
		if (display=="none"){
			display = "block";
		}
		else{
			display="none";
		}
	}
}