/* Is it correct? v0.1
november 2006
*/

window.onload   = function() {
	iic.init(); tinyScrolling.init();
};

var iic = {
	init : function() {
		if (document.getElementById('iicfrm')) {
			var bifrm = document.getElementById('iicfrm');
			bifrm.onsubmit = function() {
				iic.getInfo();	
				return false;
			}
		}
	},
	getInfo : function() {
		if (window.XMLHttpRequest) { 
		xmlhttp = new XMLHttpRequest();
		} else if (window.ActiveXObject) { 
		xmlhttp = new ActiveXObject('Microsoft.XMLHTTP');
		}
		document.getElementById('results').innerHTML ='';		
		document.getElementById('loading').innerHTML = '<img src="img/loader.gif"/>';
		xmlhttp.open('GET', 'iic.php?q='+document.getElementById('url').value+'&lang='+document.getElementById('lang').value, true);
		xmlhttp.onreadystatechange = this.handle;
		xmlhttp.send(null);
	},
	handle : function() {
		if (xmlhttp.readyState == 4) {
				if (xmlhttp.responseText.indexOf('invalid') == -1) {
				var resp = xmlhttp.responseText;
			    var u = document.createElement('div');
			    document.getElementById('results').appendChild(u);
				u.innerHTML = resp;
			    document.getElementById('loading').innerHTML = '';
				document.getElementById('button').style.display = 'none';
			}
		}
	},
	addEngine : function(lang) {
		  if ((typeof window.sidebar == "object") && (typeof
		  window.sidebar.addSearchEngine == "function"))
		  {
		    var name = lang+"_phrases"
			window.sidebar.addSearchEngine(
		      "http://isitcorrect.centralscrutinizer.it/languages/"+name+".src",
		      "http://isitcorrect.centralscrutinizer.it/languages/"+name+".png",
		      name,
		      "Reference" );
		  }
		  else
		  {
		    alert("I plugin di ricerca sono installabili solo in Firefox, Mozilla e Netscape 6+.");
		  }
	}	
}


/* Tiny Scrolling - a smooth navigation between internal links and their destinations
by Marco Rosella - http://www.centralscrutinizer.it/en/design/js-php/tiny-scrolling
based on the works by Travis Beckham and Brian McAllister.
                v0.4 - November 25, 2006
				
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA				
*/

var tinyScrolling = {
	speed : 50,      //set here the scroll speed: when this value increase, the speed decrease. 
	maxStep: 150,	 //set here the "uniform motion" step for long distances
	brakeK: 3,		 //set here the coefficient of slowing down
	hash:null,		
	currentBlock:null,
	requestedY:0,
	init: function() {
			var lnks = document.getElementsByTagName('a');   
			for(var i = 0, lnk; lnk = lnks[i]; i++) {   
				if ((lnk.href && lnk.href.indexOf('#') != -1) &&  ( (lnk.pathname == location.pathname) ||
				('/'+lnk.pathname == location.pathname) ) && (lnk.search == location.search)) {  
				lnk.onclick = tinyScrolling.initScroll;   		
				}   
			}
	},
	getTarget: function(target) {
		while(target.tagName.toLowerCase() != 'a')
			target = target.parentNode;
		return target;
	},
	getElementYpos: function(el){
			var y = 0;
			while(el.offsetParent){  
				y += el.offsetTop    
				el = el.offsetParent;
			}	return y;
	},		
	getScrollTop: function(){
			if(document.all) return (document.documentElement.scrollTop) ? document.documentElement.scrollTop : document.body.scrollTop;
			else return window.pageYOffset;   
	},	
	getWindowHeight: function(){
			if (window.innerHeight)	return window.innerHeight; 
			if(document.documentElement && document.documentElement.clientHeight) return document.documentElement.clientHeight;
	},
	getDocumentHeight: function(){
			if (document.height) return document.height;
			if(document.body.offsetHeight) return document.body.offsetHeight;
	},
	initScroll: function(e) {
			var targ;  
			if (!e) var e = window.event;
			if (e.target) targ = e.target;
			else if (e.srcElement) targ = e.srcElement;   
   			targ = tinyScrolling.getTarget(targ);
			tinyScrolling.hash = targ.href.substr(targ.href.indexOf('#')+1,targ.href.length); 
			tinyScrolling.currentBlock = document.getElementById(tinyScrolling.hash);   
			if(!tinyScrolling.currentBlock) return;
			tinyScrolling.requestedY = tinyScrolling.getElementYpos(tinyScrolling.currentBlock); 
			tinyScrolling.scroll();  
			return false;
	},
	scroll: function(){
			var top  = tinyScrolling.getScrollTop();
			if(tinyScrolling.requestedY > top) {  
				var endDistance = Math.round((tinyScrolling.getDocumentHeight() - (top + tinyScrolling.getWindowHeight())) / tinyScrolling.brakeK);
				endDistance = Math.min(Math.round((tinyScrolling.requestedY-top)/ tinyScrolling.brakeK), endDistance);
				var offset = Math.max(2, Math.min(endDistance, tinyScrolling.maxStep));
			} else { var offset = - Math.min(Math.abs(Math.round((tinyScrolling.requestedY-top)/ tinyScrolling.brakeK)), tinyScrolling.maxStep);
			} window.scrollTo(0, top + offset);  
			if(Math.abs(top-tinyScrolling.requestedY) <= 1 || tinyScrolling.getScrollTop() == top) {
				window.scrollTo(0, tinyScrolling.requestedY);
				if(!document.all || window.opera) location.hash = tinyScrolling.hash;
				mark.change_colors(tinyScrolling.hash, 30, 2500,'#D4888D','#ffffff')
				//mark.change_opacity(tinyScrolling.hash);
				tinyScrolling.hash = null;
			} else 	setTimeout(tinyScrolling.scroll,tinyScrolling.speed);
	}	
}


var mark = {        //first four functions are based on The Fade Anything Technique by Adam Michela 
	valop : 100,
	req : 0,
	make_hex: function(r,g,b) {
		r = r.toString(16); if (r.length == 1) r = '0' + r;
		g = g.toString(16); if (g.length == 1) g = '0' + g;
		b = b.toString(16); if (b.length == 1) b = '0' + b;
		return "#" + r + g + b;
	},
	change_colors: function(id, fps, duration, from, to) {  
		var frames = Math.round(fps * (duration / 1000));
		var interval = duration / frames;
		var delay = interval;
		var frame = 0;		
		if (from.length < 7) from += from.substr(1,3);
		if (to.length < 7) to += to.substr(1,3);		
		var rf = parseInt(from.substr(1,2),16);
		var gf = parseInt(from.substr(3,2),16);
		var bf = parseInt(from.substr(5,2),16);
		var rt = parseInt(to.substr(1,2),16);
		var gt = parseInt(to.substr(3,2),16);
		var bt = parseInt(to.substr(5,2),16);		
		var r,g,b,h;
		while (frame < frames) {
			r = Math.floor(rf * ((frames-frame)/frames) + rt * (frame/frames));
			g = Math.floor(gf * ((frames-frame)/frames) + gt * (frame/frames));
			b = Math.floor(bf * ((frames-frame)/frames) + bt * (frame/frames));
			h = this.make_hex(r,g,b); 		
			setTimeout("mark.set_img_bgcolor('"+id+"','"+h+"')", delay);
			frame++;
			delay = interval * frame; 
		}
		setTimeout("mark.set_img_bgcolor('"+id+"','"+to+"')", delay);
	},  
	
	set_img_bgcolor: function(id, c) {   
	    if(document.getElementById(id)) {
		var o = document.getElementById(id);
		o.style.backgroundColor = c;} else return;
	},
	get_img_bgcolor: function(id)  { 
		var o = document.getElementById(id);
		while(o) {
			var c;
			if (window.getComputedStyle) c = window.getComputedStyle(o,null).getPropertyValue("background-color");
			if (o.currentStyle) c = o.currentStyle.backgroundColor;
			if ((c != "" && c != "transparent") || o.tagName == "BODY") { break; }
			o = o.parentNode;
		}
		if (c == undefined || c == "" || c == "transparent") c = "#FFFFFF";
		var rgb = c.match(/rgb\s*\(\s*(\d{1,3})\s*,\s*(\d{1,3})\s*,\s*(\d{1,3})\s*\)/);
		if (rgb) c = this.make_hex(parseInt(rgb[1]),parseInt(rgb[2]),parseInt(rgb[3]));
		return c;
	},
	change_opacity: function(el) {
		if(!(/^menu/.test(el))) {
			var post = document.getElementById(el);
			if (mark.valop > 10 && mark.req == 0) {
				mark.valop -= 10;
				mark.set_opacity(post,mark.valop);
				if(mark.valop == 10) {mark.req = 1};
			} else 
			if (mark.valop < 100 && mark.req == 1) {
				mark.valop += 10;
				mark.set_opacity(post,mark.valop);
				if(mark.valop == 100) {mark.req = 2};
			} 
			if (mark.req != 2){
			setTimeout("mark.change_opacity('"+el+"')", 50);
			}
			else { mark.set_opacity(post,9999); mark.req = 0; return;}
		}
	},
	set_opacity: function(post,val){
		post.style.opacity='0.' + val ;
		post.style.filter="alpha(opacity=" + val + ")";
	}
}