/***********************************************

* 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;

}



function overlay(curobj, subobjstr, opt_position){

if (document.getElementById){

var subobj=document.getElementById(subobjstr)

subobj.style.display=(subobj.style.display!="block")? "block" : "none"

var xpos=getposOffset(curobj, "left")+((typeof opt_position!="undefined" && opt_position.indexOf("right")!=-1)? -(subobj.offsetWidth-curobj.offsetWidth) : 0) 

var ypos=getposOffset(curobj, "top")+((typeof opt_position!="undefined" && opt_position.indexOf("bottom")!=-1)? curobj.offsetHeight : 0)

subobj.style.left=xpos+"px"

subobj.style.top=ypos+"px"

return false

}

else

return true

}



function overlayclose(subobj){

document.getElementById(subobj).style.display="none"

}