/* 
   New Perspectives on HTML, XHTML, and DHTML
   Tutorial 11
   Tutorial Case

   Avalon Books
   Name: Molly McDonald
   Date: 6/20/07
*/

function xCoord(id) {
	object=document.getElementById(id);
	xc=parseInt(object.style.left);
	return xc;
}

function yCoord(id) {
     object=document.getElementById(id);
     yc=parseInt(object.style.top);
     return yc;
}

function placeIt(id, x, y) {
     object=document.getElementById(id);
     object.style.left=x+"px";
     object.style.top=y+"px";
}

function shiftIt(id, dx, dy) {
     object=document.getElementById(id);
     object.style.left=xCoord(id)+dx+"px";
     object.style.top=yCoord(id)+dy+"px";
}

function hideIt(id) {
     object=document.getElementById(id);
     object.style.visibility="hidden";
}

function showIt(id) {
     object=document.getElementById(id);
     object.style.visibility="visible";
}