/* change the opacity for different browsers */
function changeOpacity (opacity,id) {
    var object = document.getElementById(id).style;
    object.opacity = (opacity / 100);
    object.MozOpacity = (opacity / 100);
    object.KhtmlOpacity = (opacity / 100);
    object.filter = "alpha(opacity=" + opacity + ")";
}

/* swap visibilty of object */
function changeVisibility (objectID, newVisibility) {
	var styleObject = getStyleObject(objectID);
	if (styleObject) {
		styleObject.visibility = newVisibility;
		return true;
	} else {
		return false;
	}
} 

function checkEmail (email, invalidaddress) {
	var testresults;
	var invalidcheck = 0;
	var str = email;
	var filter = /^(\w+(?:\.\w+)*)@((?:\w+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i;
	if (filter.test(str)) {
		var tempstring = str.split("@");
		tempstring = tempstring[1].split(".");
		if (invalidaddress != null) {
			for (i=0; i<invalidaddress.length; i++){
				if (tempstring[0]==invalidaddress[i]) invalidcheck = 1;
			}
		}
		if (invalidcheck != 1) return true;
		else return false;
	} else return false;
}

/* get browser size */
function getWindowSize() {
	if (parseInt(navigator.appVersion)>3) {
		if (navigator.appName=="Netscape") {
			winW = window.innerWidth;
			winH = window.innerHeight;
		}
		if (navigator.appName.indexOf("Microsoft")!=-1) {
			winW = document.body.offsetWidth;
			winH = document.body.offsetHeight;
		}
	}
	return new Array(winW,winH);
}

/* find specifed objects left offset */
function getLeft (ele) 
{ 
	var elem = MM_findObj(ele);
	xPos     = elem.offsetLeft; 
	tempEl   = elem.offsetParent; 
	while (tempEl != null) { 
		xPos  += tempEl.offsetLeft; 
		tempEl = tempEl.offsetParent; 
	} 
	return xPos;
} // getleft

/* check query variable in url */
function getQueryVariable (variable) {
	var query = window.location.search.substring(1);
	var vars = query.split("&");
	for (var i=0;i<vars.length;i++) {
		var pair = vars[i].split("=");
		if (pair[0] == variable) return pair[1];
	}
}

function getStyleObject (objectId) {
	// cross-browser function to get an object's style object given its id
  if(document.getElementById && document.getElementById(objectId)) {
	// W3C DOM
		return document.getElementById(objectId).style;
  } else if (document.all && document.all(objectId)) {
	// MSIE 4 DOM
		return document.all(objectId).style;
  } else if (document.layers && document.layers[objectId]) {
	// NN 4 DOM.. note: this won't find nested layers
		return document.layers[objectId];
  } else {
		return false;
  }
} // getStyleObject

/* find specifed objects top offset */
function getTop(ele) 
{
	var elem = MM_findObj(ele);
	var yPos = elem.offsetTop;
	tempEl = elem.offsetParent;
	while (tempEl != null) {
		yPos  += tempEl.offsetTop;
		tempEl = tempEl.offsetParent;
	}
	return yPos;
} // gettop

/* macromedia custom image rollover function */
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_jumpMenu (targ,selObj,restore) { //v3.0
  eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
  if (restore) selObj.selectedIndex=0;
}

/* macromedia custom image rollover function */
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_reloadPage (init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}

/* macromedia custom image rollover function */
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];}
}

/* macromedia custom image rollover function */
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;
}

/* move a menu this is currently customized to make "drop-ups" instead of "drop-downs" */
function move (objToMove, objRelativeTo, positionY, positionX, yo, xo) {
	if (positionX == null) positionX = 'left';
	if (positionY == null) positionY = 'top';
	if (xo == null) xo = 0;
	if (yo == null) yo = 0;
	var x = 0;
	var y = 0;
	var styleObject = getStyleObject(objToMove);
	if(styleObject) {
		// find object's height
		var objRef = MM_findObj(objToMove);
		var objHeight = objRef.offsetHeight;
		var objWidth = objRef.offsetWidth;
		switch (positionY) {
			case "bottom": 
				y = getTop(objRelativeTo);
				break;
			case "top":
				y = getTop(objRelativeTo) - objHeight ;
				break;
			case "middle":
				y = getTop(objRelativeTo) - (objHeight/2);
				break;
		}
		switch (positionX) {
			case "left":
				x = getLeft(objRelativeTo);
				break;
			case "center":
				x = getLeft(objRelativeTo) - (objWidth/2);
				break;
			case "right":
				x = getLeft(objRelativeTo) - objWidth;
				break;
		}
		y = 36;
		x += xo;
		y += yo;
		styleObject.left = x + 'px';
		styleObject.top = y + 'px';
		return true;
	} else return false;
}

/* number only text field (seems to not work with "NUM" keys) */
function numbersOnly (myfield, e, dec) {
	var key;
	var keychar;
	if (window.event)  key = window.event.keyCode;
	else if (e) key = e.which;
	else return true;
	keychar = String.fromCharCode(key);
	if ((key==null) || (key==0) || (key==8) || (key==9) || (key==13) || (key==27) ) return true;
	else if ((("0123456789").indexOf(keychar) > -1)) return true;
	else if (dec && (keychar == ".")) {
	   myfield.form.elements[dec].focus();
	   return false;
	} else return false;
}

/* animate opacity */
function opacity (id, opacStart, opacEnd, millisec) {
    //speed for each frame
    var speed = Math.round(millisec / 100);
    var timer = 0;
    //determine the direction for the blending, if start and end are the same nothing happens
    if(opacStart > opacEnd) {
        for(i = opacStart; i >= opacEnd; i--) {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    } else if(opacStart < opacEnd) {
        for(i = opacStart; i <= opacEnd; i++)
            {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    }
}

/* open a centered popup */
function popUp (url,width,height,title,scrollbar,resizable,center) {

	//set defaults
	if (width == null) width = 600;
	if (height == null) height = 450;
	if (title == null) title = 'auto_popup';
	if (scrollbar == null) scrollbar = false;
	if (resizable == null) resizable = false;
	if (center == null) center = true;

	//set props
	scrollbar = scrollbar == true ? 'yes' : 'no';
	resizable = resizable == true ? 'yes' : 'no';
	winProperties = 'height='+height+',width='+width+',toolbar=no,location=no,scrollbars='+scrollbar+',titlebar=no,menubar=no,resizable='+resizable+',status=no';

	//open and move
	win = window.open(url,title, winProperties);
	if (!win) alert('Please disable your popup blocker to use this site.');
	else if (center) {
		if (self.screen) {
			sw = self.screen.width;
			sh = self.screen.height;
		} else return;
		win.moveTo((sw-width)/2,(sh-height)/2);
	}

}

/* resize flash object */ 
function resizeSWF (id,nWidth,nHeight) {
	if (nWidth == null || !nWidth) nWidth = '';
	if (nHeight == null || !nHeight) nHeight = '';
	nWidth = nWidth.toString();
	nHeight = nHeight.toString();
	if (nWidth.length > 0) {
		if (nWidth.substr(nWidth.length-2) != 'px' && nWidth.substr(nWidth.length-1) != '%') nWidth += "px";
		document.getElementById(id).style.width = nWidth;
		document.getElementById(id+'_div').style.width = nWidth;
	}
	if (nHeight.length > 0) {
		//alert(nHeight);
		if (nHeight.substr(nWidth.length-2) != 'px' && nHeight.substr(nWidth.length-1) != '%') nHeight += "px";
		document.getElementById(id).style.height = nHeight;
		document.getElementById(id+'_div').style.height = nHeight;
	}
}

/* stop 100% flash movie from shrinking below a certain size */
function swfSizeMin(swf_id,min_w,min_h) {
	//set it up to update
	window.onresize = function() {
		swfSizeMin(swf_id,min_w,min_h)
	}
	//get window size
	var sizes = getWindowSize();
	var win_w = sizes[0];
	var win_h = sizes[1];
	//figure out what to set flash size to
	if (win_w < min_w) var w = min_w;
	else var w = "100%";
	if (win_h < min_h) var h = min_h;
	else var h = "100%";
	//set the size
	resizeSWF(swf_id,w,h);	
}

function toggleDisplay (obj_id, display_mode) {
	if (document.getElementById) {
		var obj = document.getElementById(obj_id);
		if (display_mode != null) obj.style.display = display_mode;
		else {
			if (obj.style.display == 'none') obj.style.display = '';
			else obj.style.display = 'none';
		}
		return obj.style.display;
	}
}