/*
	Code for HowTheMarketWorks.com
*/

/*
Submit Once form validation- 
© Dynamic Drive (www.dynamicdrive.com)
For full source code, usage terms, and 100's more DHTML scripts, visit http://dynamicdrive.com
*/
function submitonce(theform){
//if IE 4+ or NS 6+
if (document.all||document.getElementById){
//screen thru every element in the form, and hunt down "submit" and "reset"
for (i=0;i<theform.length;i++){
var tempobj=theform.elements[i]
if(tempobj.type.toLowerCase()=="submit"||tempobj.type.toLowerCase()=="reset")
//disable em
tempobj.disabled=true
}
}
}

/***********************************************
* Bookmark site script- © Dynamic Drive DHTML code library (www.dynamicdrive.com)
* This notice MUST stay intact for legal use
* Visit Dynamic Drive at http://www.dynamicdrive.com/ for full source code
***********************************************/
function bookmarksite(title, url) {
 if (document.all)
  window.external.AddFavorite(url, title);
 else if (window.sidebar)
  window.sidebar.addPanel(title, url, "")
}

/* Added by Nick */
function calcMaxShares(formObject)
{
  var spend = document.getElementById('spendfield').value;
  var shareprice = document.getElementById('sharepricefield').value;
  var maxshares = spend / shareprice;
  maxshares = Math.floor(maxshares * 100) / 100; // only show 2 digits max
  if (isNaN(maxshares))  maxshares = "?";
   document.getElementById('maxsharesfield').value = maxshares;
}