var IE4 = (document.all && !document.getElementById) ? true : false;
var NS4 = (document.layers) ? true : false;
var IE5 = (document.all && document.getElementById) ? true : false;
var N6 = (document.getElementById && !document.all) ? true : false;

function RemoveBad(newStr)
	{
	var index = 0;
	var strLength = 0;
	var left = "";
	var right = "";
	var badChars;
	var InStr;

	badChars = new Array(7);
	badChars[0] = "<";
	badChars[1] = ">";
	badChars[2] = "'";
	badChars[3] = "%";
	badChars[4] = ";";
	badChars[5] = "&";
	badChars[6] = "+";

	InStr = newStr;

	strLength = InStr.length;

	for (var i=0; i<=6; i++)
		{
		index = 0;
		while (index != -1)
			{
			index = InStr.indexOf(badChars[i]);
			if (index != -1)
				{
				if (index != 0)
					{
					left = InStr.substring(0,index);
					}
				else
					{
					left = "";
					}
				if (index != strLength - 1)
					{
					right = InStr.substring(index + 1, strLength);
					}
				else
					{
					right = "";
					}
				InStr = left + right;
				}
			}
		}	 
	return InStr;
	}

function jumpto(sel)
	{
	var i;
	i = sel.selectedIndex;
	if (sel.options[i].value != "")
		{
		window.location = sel.options[i].value;
		}
	}

function which_Browser()
	{
	var a,b;
	a  = navigator.appVersion;
	b = a.charAt(0);
	if (b > 2)
		{
		nav_refresh();
		}
	}

function nav_refresh()
	{
	document.navform.reset();
	}

var browserOK = false;
var pics;
var NameString;
var objCount = 0;
NameString = navigator.appname + navigator.appCodeName + navigator.appVersion;
if (NameString.indexOf("Explorer") == -1)
	{
	if (NameString.indexOf("2.0") == -1)
		{
		browserOK = true;
		pics = new Array();
		}
	}

function preload(name, first, second)
	{
	if (browserOK)
		{
		var args = (arguments.length);
		pics[objCount] = new Array(args);
		pics[objCount][0] = name;
		for(var i=1; i < args; i++)
			{
			pics[objCount][i] = new Image();
			pics[objCount][i].src = arguments[i];
			}
		objCount++;
		}
	}

function on(name)
	{
	var imgIndex = 2;
	if (browserOK)
		{
		if (arguments.length > 1)
			{
			imgIndex = parseInt(arguments[1]);
			}
		for (i = 0; i < objCount; i++)
			{
			if (document.images[pics[i][0]] != null)
				{
				if (name != pics[i][0])
					{
					document.images[pics[i][0]].src = pics[i][1].src;
					}
				else
					{
					if (imgIndex < pics[i].length)
						{
						document.images[pics[i][0]].src = pics[i][imgIndex].src;
						}
					else
						{
						document.images[pics[i][0]].src = pics[i][1].src;
						}
					}
				}
			}
		}
	}

function extra(name)
	{
	var i=0;
	var imgIndex = 2;
	if (browserOK)
		{
		if (document.images[name] == null)
			{
			return 0;
			}
		if (arguments.length > 1)
			{
			imgIndex = parseInt(arguments[1]);
			}
		for(i=0;i<objCount;i++)
			{
			if (pics[i][0] == name) { break;
			}
		}
		if (pics[i][0] != null && imgIndex < pics[i].length)
			{
			document.images[name].src = pics[i][imgIndex].src;
			}
		else
			{
			document.images[name].src = pics[i][1].src;
			}
		return 1;
		}
	return 0;
	}

function off()
	{
	if (browserOK)
		{
		for (i = 0; i < objCount; i++)
			{
			if (document.images[pics[i][0]] != null)
				{
				document.images[pics[i][0]].src = pics[i][1].src;
				}
			}
		}
	}
			
function goToMailForm (formURL, recipient)
	{
	document.mailRecipientForm.recipient.value = recipient;
	document.mailRecipientForm.action = formURL;
	document.mailRecipientForm.submit ();
	}

function writeMailRecipientBlock ()
	{
	document.write ("<form name='mailRecipientForm' action='http://www.dow.com/' method='POST'>");
	document.write ("<input name='recipient' type='hidden' value='' />");
	document.write ("</form>");
	}

function litOrder(title, formnum, business)
	{
    changecookie("doctitle", title);
    changecookie("formnum", formnum);
    var oldvar = "http://www.dow.com/webapps/lit/litorder.asp?OPTION="+formnum+"&Business="+business+"&DocTitle="+title;
    var newvar = oldvar;
    while(oldvar.indexOf(" ") != -1)
    	{
		newvar = oldvar.substring(0,oldvar.indexOf(" "))+"%20"+oldvar.substring(oldvar.indexOf(" ")+1,oldvar.length);
		oldvar = newvar;
		}
	window.location = oldvar;
	}

function iframeFix(CurFrame) 
	{
	if(document.all)
		{
		CurFrame.width='100%';
		CurFrame.height=0;
		CurFrame.height=CurFrame.document.body.offsetHeight;
		NewHeight = CurFrame.document.body.offsetHeight-CurFrame.height+1*(CurFrame.height);
		CurFrame.height=NewHeight;
		}
	else
		{
		CurFrame.width='100%';
		CurFrame.height=450;
		}
	}

function CreateAnswerCenterLink(Destination)
	{
	document.write('<a href="' + Destination + '"><img onmouseover="this.src=');
	document.write("'/images/icon-ac2-roll.gif'");
	document.write('" onmouseout="this.src=');
	document.write("'/images/icon-ac2.gif'");
	document.write('" height="46" alt="Answer Center" src="/images/icon-ac2.gif" width="224" border="0" name="icon" /></a>');
	}

/**
 * Add a new function to be executed when the page loads.
 */
function addLoadEvent(func) {
  var oldOnload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  }
  else {
    window.onload = function() {
      oldOnload();
      func();
    }
  }
}

/**
 * Add a new class to the given DOM element.
 */
function addClass(element, value) {
  if (!element) {
    return;
  }
  if (!element.className) {
    element.className = value;
  }
  else {
    var oldClassName = element.className;
    element.className = oldClassName + ' ' + value;
  }
}

/**
 * Remove a given class from a DOM element.
 */
function removeClass(element, value) {
  if (!element || !element.className) {
    return;
  }
  else {
    var oldClasses = element.className.split(' ');
    for (var i = 0; i < oldClasses.length; i++) {
      if (oldClasses[i] == value) {
        oldClasses.splice(i, 1);
      }
    }
    element.className = oldClasses.join(' ');
  }
}