/***********************************************
* Drop Down/ Overlapping Content- © Dynamic Drive (www.dynamicdrive.com)
* This notice must stay intact for legal use.
* Visit http://www.dynamicdrive.com/ for full source code
***********************************************/

function getposOffset(overlay, offsettype){
	var totaloffset=(offsettype=="left")? overlay.offsetLeft : overlay.offsetTop;
	var parentEl=overlay.offsetParent;
	while (parentEl!=null){
		totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
		parentEl=parentEl.offsetParent;
	}
	return totaloffset;
}

var globalCurobjOffsetWidth	=	0	;	// save values in case
var globalCurobjOffsetHeight	=	0	;	// the popup form comes thru without an offsetWidth/offsetHeight

function overlay(curobj, subobjstr, x_position, y_position, x_offset, y_offset ){
  if (document.getElementById){
    var subobj=document.getElementById(subobjstr)
    subobj.style.display=(subobj.style.display!="block")? "block" : "none"

    var xpos='';
    var ypos='';

    if  ( curobj.offsetWidth > 0 )	{		// for some reason, offsetWidth is coming thru as zero
							// on the popup form

	    if  ( x_position == parseInt(x_position)	)	{
		xpos=x_position;
	    } else {
	       xpos=getposOffset(curobj, "left")
			+	(	(typeof x_position!="undefined" && x_position.indexOf("right")!=-1)
				?	-(subobj.offsetWidth-curobj.offsetWidth)
				:	0
				)
				;
	    };
	globalCurobjOffsetWidth	=	xpos	;
    } else {
	xpos = globalCurobjOffsetWidth + 20	;
    };

    if  ( curobj.offsetHeight > 0 )	{		// again, for some reason, offsetHeight comes thru as zero
	    if  ( y_position == parseInt(y_position)	)	{
		ypos=y_position;
	    } else {
		ypos=getposOffset(curobj, "top")
			+	(	(typeof y_position!="undefined" && y_position.indexOf("bottom")!=-1)
				?	curobj.offsetHeight
				:	0
				)
				;
	    };
	globalCurobjOffsetHeight	=	ypos	;
    } else {
	ypos = globalCurobjOffsetHeight	+ 20 ;
    };

    if  ( x_offset == parseInt(x_offset)	)	{
	xpos += parseInt(x_offset);				// 2007-06-07 - added parseInt (not tested before?)
    };
    if  ( y_offset == parseInt(y_offset)	)	{
	ypos += parseInt(y_offset);				// 2007-06-07 - added parseInt[
    };

    //alert ( xpos + '<-->' + ypos );
    subobj.style.left=xpos+"px"
    subobj.style.top=ypos+"px"
    return false;
  } else {
    return true;
  };
}

function overlayclose(subobj){
	document.getElementById(subobj).style.display="none"
}