var myWidth = 0;
var myHeight = 0;
var marginHeight = 0;
var pageBoxHeight = 535;

function getPageSize() {
	if(typeof(window.innerWidth) == 'number') {
		//Non-IE
		myWidth = window.innerWidth;
		myHeight = window.innerHeight;
	} else if(document.documentElement && (document.documentElement.clientWidth || document.documentElement.clientHeight)) {
		//IE 6+ in 'standards compliant mode'
		myWidth = document.documentElement.clientWidth;
		myHeight = document.documentElement.clientHeight;
	} else if(document.body && (document.body.clientWidth || document.body.clientHeight)) {
		//IE 4 compatible
		myWidth = document.body.clientWidth;
		myHeight = document.body.clientHeight;
	}
}

function writePageMargins() {
	getPageSize();
	if (myHeight && (myHeight > pageBoxHeight)) {
		marginHeight = (myHeight - pageBoxHeight) / 2;
		document.write("<style>");
		document.write("   #page {");
		document.write("		margin:"+marginHeight+"px auto;");
		document.write("	}");
		document.write("</style>")
	}
}

writePageMargins();

var current_item = "";

function showItem(itemtoshow, css_attr, css_value) {
	if(document.getElementById) {
		if(document.getElementById(itemtoshow)) {
			target = document.getElementById(itemtoshow);
			if(css_attr == "display") {
				if(css_value != "") {
					target.style.display = css_value;
				} else {
					target.style.display = "block";
				}
			} else if(css_attr == "visibility") {
				if(css_value != "") {
					target.style.visibility = css_value;
				} else {
					target.style.visibility = "visible";
				}
			} else if(css_attr == "readonly") {
				if(css_value == "true") {
					target.readOnly = true;
				} else {
					target.readOnly = false;
				}
			}
			target = "";
			itemtohide = "";
		}
	}
}

function hideItem(itemtohide, css_attr) {
	if(itemtohide == "current") {
		itemtohide = current_item;
	}
	if(document.getElementById) {
		if(document.getElementById(itemtohide)) {
			target = document.getElementById(itemtohide);
			if(css_attr == "display") {
				target.style.display = "none";
			} else if(css_attr == "visibility") {
				target.style.visibility = "hidden";
			}
			target = "";
			itemtohide = "";
		}
	}
}

function showLoadingBar() {
	showItem('loading_container', 'display', 'block');
}

function hideLoadingBar() {
	hideItem('loading_container', 'display');
}

function preloadImages() { //v3.0
  var d=document; if(d.images) { if(!d.p) d.p=new Array();
    var i,j=d.p.length,a=preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0) { d.p[j]=new Image; d.p[j++].src=a[i];}}
}
function swapImgRestore() { //v3.0
  var i,x,a=document.sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function swapImage() { //v3.0
  var i,j=0,x,a=swapImage.arguments; document.sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=findObj(a[i]))!=null) {document.sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}