var ie=document.all
var ns6=document.getElementById&&!document.all

function ietruebody(){
	return (document.compatMode && document.compatMode!="BackCompat" && !window.opera)? document.documentElement : document.body
}

function enlarge(which, e, position, imgwidth, imgheight,legenda){
	if (ie||ns6){
		crossobj=document.getElementById? document.getElementById("detalhes_grafico") : document.all.detalhes_grafico
	if (position=="center"){
		pgyoffset=ns6? parseInt(pageYOffset) : parseInt(ietruebody().scrollTop)
		horzpos=ns6? pageXOffset+window.innerWidth/2-imgwidth/2 : ietruebody().scrollLeft+ietruebody().clientWidth/2-imgwidth/2
		vertpos=ns6? pgyoffset+window.innerHeight/2-imgheight/2 : pgyoffset+ietruebody().clientHeight/2-imgheight/2
	if (window.opera && window.innerHeight) //compensate for Opera toolbar
		vertpos=pgyoffset+window.innerHeight/2-imgheight/2
		vertpos=Math.max(pgyoffset, vertpos)
	}
	else{
		var horzpos=ns6? pageXOffset+e.clientX : ietruebody().scrollLeft+event.clientX
		var vertpos=ns6? pageYOffset+e.clientY : ietruebody().scrollTop+event.clientY
	}
		crossobj.style.left=horzpos+"px"
		crossobj.style.top=vertpos+"px"
	
		crossobj.innerHTML='<div align="right" id="dragbar" class="barra" style="width:'+imgwidth+'"><span id="closetext" onClick="closepreview()" class="close" style="width:'+imgwidth+'">Fechar</span> </div><img src="'+which+'"><div align="left" id="dragbar" class="barra" style="width:'+imgwidth+'"><span id="legenda" class="legenda">&nbsp;'+legenda+'</span> </div>'
		crossobj.style.visibility="visible"
		return false
	}
	else //if NOT IE 4+ or NS 6+, simply display image in full browser window
		return true
}


function closepreview(){
crossobj.style.visibility="hidden"
}

function drag_drop(e){
	if (ie&&dragapproved){
		crossobj.style.left=tempx+event.clientX-offsetx+"px"
		crossobj.style.top=tempy+event.clientY-offsety+"px"
	}
	else if (ns6&&dragapproved){
		crossobj.style.left=tempx+e.clientX-offsetx+"px"
		crossobj.style.top=tempy+e.clientY-offsety+"px"
	}
	return false
}

function initializedrag(e){
	if (ie&&event.srcElement.id=="dragbar"||ns6&&e.target.id=="dragbar"){
		offsetx=ie? event.clientX : e.clientX
		offsety=ie? event.clientY : e.clientY
	
		tempx=parseInt(crossobj.style.left)
		tempy=parseInt(crossobj.style.top)
	
		dragapproved=true
		document.onmousemove=drag_drop
	}
}

	document.onmousedown=initializedrag
	document.onmouseup=new Function("dragapproved=false")