/*
 * ul2finder
 * written by Christian Heilmann (http://icant.co.uk)
 * turns the nested list with the ID "finder" into a dynamic list
 * uses the CSS classes defined in the variables
 */
function ul2finder()
{
	// Define variables used and classes to be applied/removed
	var i,uls,als,finder;
	var parentClass='parent';
	var showClass='shown';
	var hideClass='hidden';
	var openClass='open';

	// check if our finder list exists, if not, stop all activities
	finder=document.getElementById('finder');
	if(!finder){return;}

	// add the class domenabled to the body
	cssjs('add',document.body,'domenabled')

	// loop through all lists inside finder, position and hide them 
	// by applying the class hidden
	uls=document.getElementById('finder').getElementsByTagName('ul');
	for(i=0;i<uls.length;i++)
	{
		cssjs('add',uls[i],hideClass);
	}	

	// loop through all links of inside finder
	lis=document.getElementById('finder').getElementsByTagName('li');
	for(i=0;i<lis.length;i++)
	{
		// if the li containing the link has no nested list, skip this one
		if(!lis[i].getElementsByTagName('ul')[0])
		{
				
			continue;
		}
		var newa=document.createElement('a');
		newa.href='#';
		newa.appendChild(document.createTextNode(lis[i].firstChild.nodeValue));
		lis[i].replaceChild(newa,lis[i].firstChild);
		// otherwise apply the parent class
		cssjs('add',newa,parentClass);
		
		// if the user clicks on the link
		lis[i].getElementsByTagName('a')[0].onclick=function()
		{
		// loop through all lists inside finder
			for(var i=0;i<uls.length;i++)
			{
				// avoid the list connected to this link
				var found=false;
				for(j=0;j<uls[i].getElementsByTagName('ul').length;j++)
				{
					if(uls[i].getElementsByTagName('ul')[j] == 		
						this.parentNode.getElementsByTagName('ul')[0])
					{
						found=true;
						break;
					}
				}
				// and hide all others
				if(!found)
				{
					cssjs('add',uls[i],hideClass)
					cssjs('remove',uls[i],showClass)
					cssjs('remove',uls[i].parentNode.getElementsByTagName('a')[0],openClass)
					cssjs('add',uls[i].parentNode.getElementsByTagName('a')[0],parentClass)
				}
			}	
			// change the current link from parent to open 	
			cssjs('swap',this,parentClass,openClass)
			// show the current nested list 
			cssjs('add',this.parentNode.getElementsByTagName('ul')[0],showClass)

			// don't follow the real HREF of the link
			return false;
		}
	}	
	/*
	 * cssjs
	 * written by Christian Heilmann (http://icant.co.uk)
	 * eases the dynamic application of CSS classes via DOM
	 * parameters: action a, object o and class names c1 and c2 (c2 optional)
	 * actions: swap exchanges c1 and c2 in object o
	 *			add adds class c1 to object o
	 *			remove removes class c1 from object o
	 *			check tests if class c1 is applied to object o
	 * example:	cssjs('swap',document.getElementById('foo'),'bar','baz');
	 */
	function cssjs(a,o,c1,c2)
	{
		switch (a){
			case 'swap':
				o.className=!cssjs('check',o,c1)?o.className.replace(c2,c1):o.className.replace(c1,c2);
			break;
			case 'add':
				if(!cssjs('check',o,c1)){o.className+=o.className?' '+c1:c1;}
			break;
			case 'remove':
				var rep=o.className.match(' '+c1)?' '+c1:c1;
				o.className=o.className.replace(rep,'');
			break;
			case 'check':
				return new RegExp('\\b'+c1+'\\b').test(o.className)
			break;
		}
	}
}

// Check if the browser supports DOM, and start the script if it does.
//if(document.getElementById && document.createTextNode)
//{
	//window.onload=ul2finder;
//}


	function get_aq() {
	    var url = '/cgi-bin/cbin2/aqi_get.cgi';

		if(window.XMLHttpRequest && !(window.ActiveXObject)) {
			try {
				req = new XMLHttpRequest();
			} catch(e) {
				req = false;
        		}
			
			// branch for IE/Windows ActiveX version
		} else if(window.ActiveXObject) {
			try {
				req = new ActiveXObject("Msxml2.XMLHTTP");
			} catch(e) {
				window.alert(e);
				try {
					req = new ActiveXObject("Microsoft.XMLHTTP");
				} catch(e) {
					window.alert(e);
					req = false;
				}
			}
    	}
		if(req) {
			req.open("GET", url, false); // should be true/onready
			req.send("");
			//alert('Foo in here: '+req.responseText);
			if (req.responseText) {
				var pAir = document.getElementById("air_p");
				if (req.responseText == "good") {
					pAir.className = "air_p1";
				} else if (req.responseText == "moderate") {
					pAir.className = "air_p2";
				} else if (req.responseText == "unhealthy for sensitive groups") {
					pAir.className = "air_p3";
				} else if (req.responseText == "unhealthy") {
					pAir.className = "air_p3";
				} else if (req.responseText == "very unhealthy") {
					pAir.className = "air_p3";
				} else { 
					pAir.className = "air_p";
				}
				//window.alert("foo.id: "+pAir.className);

				// DEBUG //
				/*
				var debug;
				for (obj in pElement) {
					if (pElement[obj]) {
						debug += obj+" = "+pElement[obj]+"\n";
					}
				}
				window.alert(debug);
				*/
				// END DEBUG //
				
			} 
		} else {
			window.alert("Houston we have a problem!");
		}
	}