function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}


	var click = false;
	function change_img(img_number)
	{
		var newimg = eval("pic_" + img_number);
		//alert (newimg);
		if (document.images)
	    {
    		 document['big_image'].src= newimg.src;
    	}
	}
	
function lightup(imgName)
 {
   if (document.images)
    {
      imgOn=eval("pic_" + imgName + ".src");
      document['big_image'].src= imgOn;
    }
 }

function turnoff(imgName)
 {
   if (document.images)
    {
      document['big_image'].src= pic_orig.src;
    }
 }
 
 function numbersonly(myfield, e, dec)
{
	var key;
	var keychar;
	if (window.event)
	 key = window.event.keyCode;
	else if (e)
	 key = e.which;
	else
	 return true;
	keychar = String.fromCharCode(key);
	// control keys
	if ((key==null) || (key==0) || (key==8) || 
	 (key==9) || (key==13) || (key==27) )
	 return true;
	// numbers
	else if ((("0123456789").indexOf(keychar) > -1))
	 return true;
	// decimal point jump
	else if (dec && (keychar == "."))
	 {
	 myfield.form.elements[dec].focus();
	 return false;
	 }
	else
	 return false;
}