/*====================================================================
ARSMULTIMEDIA KERNEL
»»»»»»»»»»»»
AUTHOR: PIERO BONA (piero@arsmultimedia.net)
COPYRIGHTS ARSMULTIMEDIA.NET (http://www.arsmultimedia.net)
March 2005

Warning: if you're putting your dirty hands on my code, please
keep it clean and tidy :)
====================================================================*/
var ARSKRNL = {
	//Event listener by Scott Andrew (www.scottandrew.com)
	addEvent: function(obj, evType, fn, useCapture){
		if(obj.addEventListener){
			obj.addEventListener(evType, fn, useCapture);
			return true;
		}else if(obj.attachEvent){
			var r = obj.attachEvent('on'+evType, fn);
			return r;
		}else{
			return false;
		}
	},
	//Method based on Disenorama (www.disenorama.com), which in turn is based in Dan Pupius' (pupius.co.uk)
	getElementByClass: function(className, node){
		if(!node) node=document;
		var refTags = document.all ? node.all : node.getElementsByTagName("*");
		var retVal = new Array();
		for(var z=0;z<refTags.length;z++){
			if(refTags[z].className==className)
				retVal.push(refTags[z]);
		}
		return retVal;
	},
	
	getLabelsByFor: function(str){
		var labels = document.getElementsByTagName('label');
		for(var j=0;j<labels.length;j++){
			if(labels[j].htmlFor==str){
				return labels[j];
				break;
			}
		}
	},
	
	getFormIndividualElements: function(node){
		if(!node) node=document;
		var refTags = document.all ? node.all : node.getElementsByTagName("*");
		var retVal = new Array();
		for(var t=0;t<refTags.length;t++){
			if(refTags[t].tagName=='INPUT'||refTags[t].tagName=='TEXTAREA'||refTags[t].tagName=='SELECT'){
				if(refTags[t].getAttribute('type')!='checkbox')
					retVal.push(refTags[t]);
			}
		}
		return retVal;
	},
	
	getFormGroupedElements: function(node){
		if(!node) node=document;
		var refTags = document.all ? node.all : node.getElementsByTagName("*");
		var retVal = new Array();
		var actualLabel = '';
		for(var t=0;t<refTags.length;t++){
			if(refTags[t].getAttribute('type')=='checkbox'){
				var l = refTags[t].getAttribute('name');
				if(l!=actualLabel){
					retVal.push(l);
				}
				actualLabel = l;		
			}
		}
		return retVal;
	},
	
	getElementsByName: function(name, node){
		if(!node) node=document;
		var refTags = document.all ? node.all : node.getElementsByTagName("*");
		var retVal = new Array();
		for(var t=0;t<refTags.length;t++){
			if(refTags[t].getAttribute('name')==name)
				retVal.push(refTags[t]);
		}
		return retVal;		
	},
	
	addStyleSheet: function(stylesheet){
		tagsHead = document.getElementsByTagName('head');
		for(var h=0;h<tagsHead.length;h++) {tagHead = tagsHead[h]}
		newStyleSheet = document.createElement('link');
		attrHREF = document.createAttribute('href');
		attrREL = document.createAttribute('rel');
		attrTYPE = document.createAttribute('type');
		attrHREF.value = stylesheet;
		attrREL.value = "stylesheet";
		attrTYPE.value = "text/css";
		newStyleSheet.setAttributeNode(attrHREF);
		newStyleSheet.setAttributeNode(attrREL);
		newStyleSheet.setAttributeNode(attrTYPE);				
		tagHead.appendChild(newStyleSheet);
	},
	
	getAbsolutePos: function(el) {
		var SL = 0, ST = 0;
		var is_div = /^div$/i.test(el.tagName);
		if (is_div && el.scrollLeft)
			SL = el.scrollLeft;
		if (is_div && el.scrollTop)
			ST = el.scrollTop;
		var r = { x: el.offsetLeft - SL, y: el.offsetTop - ST };
		if (el.offsetParent) {
			var tmp = this.getAbsolutePos(el.offsetParent);
			r.x += tmp.x;
			r.y += tmp.y;
		}
		return r;
	},
	
	stringTrim: function(string){
		string = string.replace( /^\s+/g, "" );
		return string.replace( /\s+$/g, "" );
	}
	
}


//---------------------------------------------------------------------------------------------------------------------------------------
if(!Array.prototype.push){
	Array.prototype.push = function(){
		var i;
		for(i=0;j=arguments[i];i++) this[this.length] = j;
		return this.length;
	}
}