// 
var banners = new Array();
banners[0] = '<a href="http://www.idxcentral.com/syaor/idxsearch.cfm?idxid=krealty&pg=hnlmapmns" target="_top"><img src="http://www.kingrealty-norcal.com/images/global/banner/email_listing.gif" alt="" height="60" width="468" border="0"></a>';
banners[1] = '<a href="http://www.idxcentral.com/ncbor/idxsearch.cfm?idxid=krealty&pg=featured&lo=king%20realty" target="_top"><img id="banner_ad" src="http://www.kingrealty-norcal.com/images/global/banner/banner_featuredlistings.gif" alt="" name="banner_ad" height="60" width="468" border="0"></a>';


// Image swapping by element id and string parse.
// The "_o" is for on, add or remove this for on|off states of a graphic.
// This assumes that both images are in the same directory. You can force a state with the state flag.
function setImageByParse(id, state) {
	if (document.images) {
		var ext = document.getElementById(id).src.substring(document.getElementById(id).src.lastIndexOf('.'));
		var path = document.getElementById(id).src.substring(0, document.getElementById(id).src.lastIndexOf('.'))
		var end = path.lastIndexOf('/');
		var file = path.substring(end + 1);
		path = path.slice(0, end + 1);
		// now do the test
		if (file.length > 2) {
			if (file.substring(file.length -2) == "_o") { // it's on turn off
			if (state == "on") { return true; } // it's  already on just return
				document.getElementById(id).src = path + (file.slice(0, file.length -2)) + ext;
			} else {
				if (state == "off") { return true; } // it's allready off just return
				document.getElementById(id).src = path+file+"_o"+ext;
			}
		}
	}
}
// Return the id of the first child html element.
function returnFirstChild(argObj) {
var obj = getRawObject(argObj); 
for (var i = 0; i < obj.childNodes.length; i++) { 
	if (obj.childNodes[i].nodeType == 1) {	
		return obj.childNodes[i].id;
	 }
	} 
}
// Convert object name string or object reference into a valid element object reference.
function getRawObject(obj) {
var theObj;
	if (typeof obj == "string") {
		theObj = document.getElementById(obj);
	} else {
	// pass on object reference
	theObj = obj;
	}
return theObj;	
}
// preload all the images required based on the image ids
function autoload() {
var elems = document.getElementsByTagName("img");
for (var i = 0; i < elems.length; i++) {		
			if (elems[i].id.indexOf("pre_") != -1) { // preload required
				var path = elems[i].src.substring(0, (elems[i].src.lastIndexOf('/')+1)); // get the path
				var ext = elems[i].src.substring(elems[i].src.lastIndexOf('.')) // get the file ext
				var image = elems[i].src.substring((elems[i].src.lastIndexOf('/')+1)) // get the imagename
				var image = image.slice(0, image.lastIndexOf('.'));
				preloadImages(path + image + "_o" + ext);
			 }
		}	
}
// preload rollover images
function preloadImages(img) {
  if(document.images){ 
  	var imageObj = new Image;
  	imageObj.src=img;
	}
}
// open a new window and center it
var myWindow; // global window object
function openCenteredWindow(url) {
	var width = screen.availWidth - 200; 
	var height = screen.availHeight - 200;
	var left = parseInt((screen.availWidth/2)-(width/2));
	var top = parseInt((screen.availHeight/2)-(height/2));
	var windowFeatures = "width=" + width + ",height=" + height + ",status,scrollbars,resizable,left=" + left + ",top=" + top + ",screenX=" + left + ",screenY=" + top;
	myWindow = window.open(url, "subWind", windowFeatures);
	myWindow.focus();
}
// display a random banner ad
function getBanner() {
var currIndex = Math.floor(Math.random() * (banners.length));
return banners[currIndex];
}