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, id){
if (document.getElementById){
var subobj=document.getElementById(subobjstr)
var subobj2=document.getElementById("in"+subobjstr)
if (subobjstr=="cc") {
subobj2.innerHTML="Are you sure you want to cover this shift?<br /><br />"
subobj2.innerHTML+="<div style=\"text-align:right\"><a href=\"?id="+id+"&covact=cov\">ALL</a>&nbsp;&nbsp;|&nbsp;&nbsp;<a href=\"schedule.php?p=coverpt_add&id="+id+"\">PART</a>&nbsp;&nbsp;|&nbsp;&nbsp;<a href=\"#\" onClick=\"overlayclose(\'"+subobjstr+"\'); return false\">CANCEL</a></div>"
}
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"
}