function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_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=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

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

function signupcheck(form) {
	rex = new RegExp(/^[a-zA-Z][\w\.-]*[a-zA-Z0-9]*@[a-zA-Z0-9][\w\.-]*[a-zA-Z0-9]\.[a-zA-Z][a-zA-Z\.]*[a-zA-Z]$/);
	if(!rex.test(form.email.value)) {
		alert('Please enter a valid email address');
		return false;
	}
	else if(form.name.value == ""){
		alert('Please enter your name');
		return false;
	}
}

function imageView(imgFile,imgTitle,imgWidth,imgHeight)
{
	// determine browser size
  var myWidth = 0, myHeight = 0;
  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;
  }

	// determine browser location
	var leftPos = (screen.width-imgWidth)/2;
	var topPos = (screen.height-imgHeight)/2-50;

	winWidth=imgWidth+20;
	winHeight=imgHeight+60;

	settings="resizable=yes,width="+winWidth+",height="+winHeight+",left="+leftPos+",top="+topPos;
	preview = window.open("","mywindow",settings);
	preview.document.open("text/html", "replace");
	preview.document.write('<html><head><title>'+imgTitle+'<\/title><\/head>'
	+'<body>'
	+'<center>'
	+'<img border="0" alt="'+imgTitle+'" src="'+imgFile+'" width="'+imgWidth+'" height="'+imgHeight+'" \/>'
	+'<br \/><br \/>'
	+'<button onclick="window.close();">Close window<\/button>'
	+'<\/center>'
	+'<\/body>'
	+'<\/html>');
	preview.document.close();
}