if( top != self )
{
	//alert(top.location.href);
	//alert('The URL you enterred -\n'+ top.location.href +'\nor the link you clicked is NOT the owner of this site\n\rThe site is being displayed in a frame on an unauthorized web site.\n\r\n\rClick OK to jump out of this frame and display the correct URL in the Browser');
	top.location=self.document.location;
}
function Window_onload()
{
    var rads = document.getElementsByName("rbgGaps");
	for (var i =0 ; i< rads.length; i++) 
	{
		rads[i].onclick = EvenGap_onchange;
	}
	rads = document.getElementsByName("rbgType");
	for (var i =0 ; i< rads.length; i++) 
	{
		rads[i].onclick = Type_onchange;
	}	
	if (document.getElementById("rbEvenGapsTails").checked)
	    document.getElementById("divGapType").style.display = "none";
	Type_onchange();
    var boxes = document.getElementsByTagName("input");
	for (var i=0; i< boxes.length; i++)
	{
		if (boxes[i].type=="text")
		{
			if (document.all)
				boxes[i].onkeypress = Check_IE;
			else
				boxes[i].onkeypress = Check_NS;	
		}
	}
}
function Check_IE()
{
	var v = event.keyCode;
	if ((v > 47 && v < 58) || v==0 || v==8)
		return true;
	return false;
}
function Check_NS(e)
{
	var v = e.which;
	if ((v > 47 && v < 58) || v==0 || v==8)
		return true;
	e.preventDefault();
}
function CheckInput()
{
	var width = parseInt(document.getElementById("ddWidthInches").value) * 32 + parseInt(document.getElementById("ddWidthFrac").value);
	var tails = parseInt(document.getElementById("ddTails").value);
	var tailWidth = parseInt(document.getElementById("ddTailWidthInches").value) * 32 + parseInt(document.getElementById("ddTailWidthFrac").value);
	var thick = parseInt(document.getElementById("ddTailThickFrac").value);
	var minGap = 6;
	if (document.getElementById("rbEvenSpacing").checked)
	{	
	    if (document.getElementById("rbEvenGapsTails").checked) 
	        gap = (width - tailWidth) / ((tails * 2)-1);     
        else
            gap = ((width - tailWidth) - (tails * tailWidth)) / (tails -1); 
	    if (gap < minGap)
        {             
            alert("Will not fit");
	        return false;
        }
	}		
	else if (document.getElementById("rb4t2c").checked)
	{		
		if (document.getElementById("rbEvenGapsTails").checked)
		    gap = (width - tailWidth) / 11;    
		else
		    gap = ((width - tailWidth) - (tailWidth * 6)) / 5;  
		
		if (gap < minGap)
        {             
	        alert("Will not fit 2 in centre");
	        return false;
	    }
    }
	return true;
}
function Type_onchange()
{
    if (document.getElementById("rbEvenSpacing").checked)
    {
        document.images["imgType"].src = "images/Even.gif";
        document.getElementById("divTails").style.display = "block";
    }
    else
    {
        document.images["imgType"].src = "images/Four.gif";
        document.getElementById("divTails").style.display = "none";
    }
}
function EvenGap_onchange()
{
	if (document.getElementById("rbSetTailWidth").checked)
		document.getElementById("divGapType").style.display = "block";
	else
		document.getElementById("divGapType").style.display = "none";
}
function ConEng(h, useFeet)
{	
	var ts = Math.round(h);
	// TO CHECK IN 32nds, UNCOMMENT BELOW
	var f=0, i=0, ft=0, fb=32;
	var eng = "";
	
	if (ts >= 384 && useFeet) // its longer than 1 foot
	{
		f = Math.floor(ts/384);
		ts-= (f*384); // take out the feet
		eng+=  f.toString() +"'";
	}
	var hasInch = false;
	
	if (ts >= 32) // we have inches left over
	{
		i = Math.floor(ts/32);
		ts-= (i*32);
		eng+=i.toString();
		hasInch = true;
	}
	if (Math.floor(ts) > 0) // it has a fraction
	{
		hasInch = true;
		if (i >0) // only if the fraction follows an inches measurement
			eng+= "~";
		
		ft = Math.floor(ts);
		fb = 32;
		
		while (ft%2 == 0 && ft > 1 && ft < 32) // it can be halved and its > 1
		{
			ft/=2; // loop  till smallest
			fb/=2;
		}
		eng+= ft.toString() +"/"+ fb.toString();
	}
	if (hasInch)
		eng+= "\"";
	
	return eng;
}
function BtnCalculate_Click()
{
    if (! CheckLimit())
        return;
    if (! CheckInput())
        return;
    document.getElementById("btnCalculate").disabled = true;
    setTimeout("ReactivateButton()", 3000);
    document.images["imgLoading"].style.display = "block";
    var wide = parseInt(document.getElementById("ddWidthInches").value) * 32 + parseInt(document.getElementById("ddWidthFrac").value);
    var url = "ImageGen/DrawDovetailEng.ashx?w=" + wide;
    url+= "&t=" + document.getElementById("ddTailThickFrac").value;
    url+= "&st=" + document.getElementById("ddSocketThickFrac").value;
    if (document.getElementById("rbEvenSpacing").checked)
         url+= "&tls=" + document.getElementById("ddTails").value;
    else 
         url+= "&tls=6";
    if (document.getElementById("rbEvenSpacing").checked)
        url+= "&type=even";
    else
         url+= "&type=4t2c";
    url+= "&p="+ document.getElementById("ddPitch").value
    var tailWidth = parseInt(document.getElementById("ddTailWidthInches").value) * 32 + parseInt(document.getElementById("ddTailWidthFrac").value);
    url+= "&tw=" + tailWidth;
    url += "&et=" + document.getElementById("rbEvenGapsTails").checked; 
    url += "&c="+ document.getElementById("cbColor").checked;
    document.images["imgDovetail"].src = url;
    //document.images["imgBuffer"].src = url; 
}
var imgBuff;
function FadeImage()
{
    setTimeout("FadeDelay()", 200);
}
function FadeDelay()
{
    if (document.all) 
	{
		document.images["imgDovetail"].filters.blendTrans.Apply();
	}
	document.images["imgDovetail"].src = document.images["imgBuffer"].src; 
	if (document.all) 
	{ 
		document.images["imgDovetail"].filters.blendTrans.Play(); // fade it
	}
}
function ReactivateButton()
{
    document.getElementById("btnCalculate").disabled = false;
    document.images["imgLoading"].style.display = "none";
}
function PitchChanged(dd)
{
    if (dd.value == "0")
    {
        document.getElementById("rbEvenGapsTails").checked = true;
        document.getElementById("rbEvenSpacing").checked = true;
        document.getElementById("spn4t2c").style.display = "none";
        document.getElementById("spnSetTailWidth").style.display = "none";
        document.getElementById("divTails").style.display = "block";
        document.images["imgType"].src = "images/Even.gif";
        document.getElementById("divGapType").style.display = "none";
    }
    else
    {
        document.getElementById("spn4t2c").style.display = "block";
        document.getElementById("spnSetTailWidth").style.display = "block";
        document.getElementById("divGapType").style.display = "block";
    }
}