var NS4DOM = document.layers ? true:false;
var IEDOM = document.all ? true:false;
var W3CDOM = document.getElementById ? true: false;

function getObject(id){
	if(NS4DOM) ref="document."+id;
	else if(IEDOM) ref=id;
	else if(W3CDOM) ref="document.getElementById('"+id+"')";
	var object=eval(ref);
	return object;
}

function placeIt(id, x, y){
	var object=getObject(id);
	if(NS4DOM) object.moveTo(x, y)
	else if (IEDOM || W3CDOM) {
		object.style.left=x;
		object.style.top=y;
	}
}

function shiftIt(id, dx, dy){
	var object=getObject(id);
	if(NS4DOM) object.moveBy(dx,dy);
	else if(IEDOM){
		object.style.pixelLeft=object.style.pixelLeft+dx;
		object.style.pixelTop=object.style.pixelTop+dy;
	}
	else if(W3CDOM){
		object.style.left=parseInt(object.style.left)+dx;		
		object.style.top=parseInt(object.style.top)+dy;
	}
	
}

function xCoord(id){
	var object=getObject(id);
	if(NS4DOM) xc=object.left;
	else if(IEDOM) xc=object.style.pixelLeft;
	else if(W3CDOM) xc=parseInt(object.style.left);
	return xc;
}

function yCoord(id){
	var object=getObject(id);
	if(NS4DOM) yc=object.top;
	else if(IEDOM) yc=object.style.pixelTop;
	else if(W3CDOM) yc=parseInt(object.style.top);
	return yc;
}

function hideIt(id){
	var object=getObject(id);
	if(NS4DOM) object.visibility="hide";
	else if(IEDOM || W3CDOM) object.style.visibility="hidden";
}

function showIt(id){
	var object=getObject(id);
	if(NS4DOM) object.visibility="show";
	else if(IEDOM || W3CDOM) object.style.visibility="visible";
}

function winWidth(){
	if(window.innerWidth) return window.innerWidth;
	else if(document.documentElement)
	return document.documentElement.offsetWidth;
	else if (document.body.clientWidth)
	return document.body.clientWidth;	
}

function winHeight(){
	if(window.innerHeight) return window.innerHeight;
	else if(document.documentElement)
	return document.documentElement.offsetHeight;
	else if (document.body.clientHeight)
	return document.body.clientHeight;	
}