function yousure(msg)
	{
		if (!msg) {msg = "Are you sure?";}
		
		var where_to= confirm(msg);

		if (where_to == true) {
			return true;
		} else if (where_to == false) {
			return false;
		}
	}

	// show / hide an area
	function toggle ( target )
	{
	  if (document.getElementById)
	  {
			target = document.getElementById( target );
			
			if (target.style.display == "none")
			{
				target.style.display 	= "";
			}
			else
			{
				target.style.display 	= "none";
			}
		}
	}

	var lastStep;
	function Step(n){
//		if (n==1 && lastStep==0) Prepare();
//		else if (n==2 && lastStep==1) Convert();

		var ts = document.getElementById('tabstrip');
		var a = ts.getElementsByTagName('a');

		for (var i=0,len=a.length;i<len;i++){
			a[i].className="";
			document.getElementById('content'+i).style.display="";
		}

		a[n].className="on";
		document.getElementById('content'+n).style.display="block";
		lastStep=n;
	}
	
	// in admin product area, this func changes stock count in input field and total color field
	function changeStock(box,extra,ud)
	{
		target 	= document.getElementById(box).value;
		target2	= document.product['total_quantity_reading_'+extra].value;
		
		// by default, input fields don't show a value, so if admin +/-'s, the total count
		// won't increment properly. set to 0 and it'll work
		if (target == "") {target = 0;}
		if (target2 == "") {target2 = 0;}

		if (ud == "minus" && target != 0)
		{
			--target;
			--target2;
		}
		else if (ud == "plus")
		{
			++target;
			++target2;
		}
		
		document.getElementById(box).value = target;
		document.getElementById('total_quantity_reading_'+extra).value = target2;
	}

	// load in parent for IFRAME
	function lip(place)
	{
		parent.location = place;
	}

	function popup(url,w,h)
	{
		window.open(url,"popup_pd","fullscreen=no,toolbar=no,status=no,menubar=no,scrollbars=auto,resizable=yes,directories=no,location=no,width="+w+",height="+h).focus();
		return false;
	}

	function closeWindow()
	{
		self.opener=null;
		self.close();
	}
	
	// change images	
	function changePic(url,picNum,totalPics)
	{
		if (picNum < 2) 
		{
			picNum = pic_num = 2;
		}
		else if (picNum > totalPics) 
		{
			picNum = pic_num = totalPics;
		}
	
		frames['pic_big'].location = url+picNum;
	}
	
	// cart: change quantity
	function cartChangeQuantity(cartId,quantity)
	{
		so = document.getElementById('shipping_option').value;
		document.location.href	= 'func-store.php?func=change_quantity&action_area=cart&cart_id='+cartId+'&quantity='+quantity+'&shipping_option='+so;
	}
	
	// cart: change paper dollars used
	function cartChangePD(pd) {
		document.location.href = 'func-store.php?func=change_pd&pd_used='+pd;
	}
	
	// cart: change shipping
	function cartChangeShipping(totalCost,shippingOption)
	{
		cid = document.getElementById('cart_id').value;
		document.location.href = 'func-store.php?func=change_shipping&action_area=cart&cart_id='+cid+'&shipping_option='+shippingOption;
	}

	// cart: change gift wrap
	function cartChangeGiftWrap(gw)
	{
		if (gw == true) {
			gw = 1;
		} else {
			gw = 0;
		}

		cid = document.getElementById('cart_id').value;
		document.location.href = 'func-store.php?func=change_gift_wrap&action_area=cart&cart_id='+cid+'&gift_wrap='+gw;
	}

	function cartChangeShipTo(w) {
		cid = document.getElementById('cart_id').value;
		document.location.href = 'func-store.php?func=change_ship_to&action_area=cart&cart_id='+cid+'&ship_to='+w;
	}

	// dropdown jump
	function MM_jumpMenu(targ,selObj,restore)
	{
		eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
		if (restore) selObj.selectedIndex=0;
	}
	
	// getelementbyid
	function getId(id)
	{
		return document.getElementById(id);
	}

/**
*
* Base64 encode / decode
* http://www.webtoolkit.info/
*
**/

var Base64 = {

    // private property
    _keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",

    // public method for encoding
    encode : function (input) {
        var output = "";
        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
        var i = 0;

        input = Base64._utf8_encode(input);

        while (i < input.length) {

            chr1 = input.charCodeAt(i++);
            chr2 = input.charCodeAt(i++);
            chr3 = input.charCodeAt(i++);

            enc1 = chr1 >> 2;
            enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
            enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
            enc4 = chr3 & 63;

            if (isNaN(chr2)) {
                enc3 = enc4 = 64;
            } else if (isNaN(chr3)) {
                enc4 = 64;
            }

            output = output +
            this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
            this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);

        }

        return output;
    },

    // public method for decoding
    decode : function (input) {
        var output = "";
        var chr1, chr2, chr3;
        var enc1, enc2, enc3, enc4;
        var i = 0;

        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

        while (i < input.length) {

            enc1 = this._keyStr.indexOf(input.charAt(i++));
            enc2 = this._keyStr.indexOf(input.charAt(i++));
            enc3 = this._keyStr.indexOf(input.charAt(i++));
            enc4 = this._keyStr.indexOf(input.charAt(i++));

            chr1 = (enc1 << 2) | (enc2 >> 4);
            chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
            chr3 = ((enc3 & 3) << 6) | enc4;

            output = output + String.fromCharCode(chr1);

            if (enc3 != 64) {
                output = output + String.fromCharCode(chr2);
            }
            if (enc4 != 64) {
                output = output + String.fromCharCode(chr3);
            }

        }

        output = Base64._utf8_decode(output);

        return output;

    },

    // private method for UTF-8 encoding
    _utf8_encode : function (string) {
        string = string.replace(/\r\n/g,"\n");
        var utftext = "";

        for (var n = 0; n < string.length; n++) {

            var c = string.charCodeAt(n);

            if (c < 128) {
                utftext += String.fromCharCode(c);
            }
            else if((c > 127) && (c < 2048)) {
                utftext += String.fromCharCode((c >> 6) | 192);
                utftext += String.fromCharCode((c & 63) | 128);
            }
            else {
                utftext += String.fromCharCode((c >> 12) | 224);
                utftext += String.fromCharCode(((c >> 6) & 63) | 128);
                utftext += String.fromCharCode((c & 63) | 128);
            }

        }

        return utftext;
    },

    // private method for UTF-8 decoding
    _utf8_decode : function (utftext) {
        var string = "";
        var i = 0;
        var c = c1 = c2 = 0;

        while ( i < utftext.length ) {

            c = utftext.charCodeAt(i);

            if (c < 128) {
                string += String.fromCharCode(c);
                i++;
            }
            else if((c > 191) && (c < 224)) {
                c2 = utftext.charCodeAt(i+1);
                string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
                i += 2;
            }
            else {
                c2 = utftext.charCodeAt(i+1);
                c3 = utftext.charCodeAt(i+2);
                string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
                i += 3;
            }

        }

        return string;
    }

}