/*
    DOMhelp 1.0
    written by Chris Heilmann
    http://www.wait-till-i.com
    To be featured in "Beginning JavaScript for Practical Web Development, Including  AJAX" 
*/
DOMhelp={
    debugWindowId:'DOMhelpdebug',
    init:function(){
        if(!document.getElementById || !document.createTextNode){return;}
    },
    lastSibling:function(node){
        var tempObj=node.parentNode.lastChild;
        while(tempObj.nodeType!=1 && tempObj.previousSibling!=null){
            tempObj=tempObj.previousSibling;
        }
        return (tempObj.nodeType==1)?tempObj:false;
    },
    firstSibling:function(node){
        var tempObj=node.parentNode.firstChild;
        while(tempObj.nodeType!=1 && tempObj.nextSibling!=null){
            tempObj=tempObj.nextSibling;
        }
        return (tempObj.nodeType==1)?tempObj:false;
    },
    getText:function(node){
        if(!node.hasChildNodes()){return false;}
        var reg=/^\s+$/;
        var tempObj=node.firstChild;
        while(tempObj.nodeType!=3 && tempObj.nextSibling!=null || reg.test(tempObj.nodeValue)){
            tempObj=tempObj.nextSibling;
        }
        return tempObj.nodeType==3?tempObj.nodeValue:false;
    },
    setText:function(node,txt){
        if(!node.hasChildNodes()){return false;}
        var reg=/^\s+$/;
        var tempObj=node.firstChild;
        while(tempObj.nodeType!=3 && tempObj.nextSibling!=null || reg.test(tempObj.nodeValue)){
            tempObj=tempObj.nextSibling;
        }
        if(tempObj.nodeType==3){tempObj.nodeValue=txt}else{return false;}
    },
    createLink:function(to,txt){
        var tempObj=document.createElement('a');
        tempObj.appendChild(document.createTextNode(txt));
        tempObj.setAttribute('href',to);
        return tempObj;
    },
    createTextElm:function(elm,txt){
        var tempObj=document.createElement(elm);
        tempObj.appendChild(document.createTextNode(txt));
        return tempObj;
    },
    closestSibling:function(node,direction){
        var tempObj;
        if(direction==-1 && node.previousSibling!=null){
            tempObj=node.previousSibling;
            while(tempObj.nodeType!=1 && tempObj.previousSibling!=null){
                 tempObj=tempObj.previousSibling;
            }
        }else if(direction==1 && node.nextSibling!=null){
            tempObj=node.nextSibling;
            while(tempObj.nodeType!=1 && tempObj.nextSibling!=null){
                 tempObj=tempObj.nextSibling;
            }
        }
        return tempObj.nodeType==1?tempObj:false;
    },
    initDebug:function(){
        if(DOMhelp.debug){DOMhelp.stopDebug();}
        DOMhelp.debug=document.createElement('div');
        DOMhelp.debug.setAttribute('id',DOMhelp.debugWindowId);
        document.body.insertBefore(DOMhelp.debug,document.body.firstChild);
    },
    setDebug:function(bug){
        if(!DOMhelp.debug){DOMhelp.initDebug();}
        DOMhelp.debug.innerHTML+=bug+'\n';
    },
    stopDebug:function(){
        if(DOMhelp.debug){
            DOMhelp.debug.parentNode.removeChild(DOMhelp.debug);
            DOMhelp.debug=null;
        }
    },
    getKey:function(e){
        if(window.event){
          var key = window.event.keyCode;
        } else if(e){
          var key=e.keyCode;
        }
        return key;
    },
/* helper methods */
    getTarget:function(e){
        var target = window.event ? window.event.srcElement : e ? e.target : null;
        if (!target){return false;}
        while(target.nodeType!=1 && target.nodeName.toLowerCase()!='body'){
            target=target.parentNode;
        }
        return target;
    },
    stopBubble:function(e){
        if(window.event && window.event.cancelBubble){
            window.event.cancelBubble = true;
        } 
        if (e && e.stopPropagation){
            e.stopPropagation();
        }
    },
    stopDefault:function(e){
        if(window.event && window.event.returnValue){
            window.event.returnValue = false;
        } 
        if (e && e.preventDefault){
            e.preventDefault();
        }
    },
    cancelClick:function(e){
        if (window.event){
            window.event.cancelBubble = true;
            window.event.returnValue = false;
        }
        if (e && e.stopPropagation && e.preventDefault){
            e.stopPropagation();
            e.preventDefault();
        }
    },
    addEvent: function(elm, evType, fn, useCapture){
        if (elm.addEventListener){
            elm.addEventListener(evType, fn, useCapture);
            return true;
        } else if (elm.attachEvent) {
            var r = elm.attachEvent('on' + evType, fn);
            return r;
        } else {
            elm['on' + evType] = fn;
        }
    },
    cssjs:function(a,o,c1,c2){
        switch (a){
            case 'swap':
                o.className=!DOMhelp.cssjs('check',o,c1)?o.className.replace(c2,c1):o.className.replace(c1,c2);
            break;
            case 'add':
                if(!DOMhelp.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':
                var found=false;
                var temparray=o.className.split(' ');
                for(var i=0;i<temparray.length;i++){
                    if(temparray[i]==c1){found=true;}
                }
                return found;
            break;
        }
    },
    safariClickFix:function(){
      return false;
    }
}


WebBrowser1 = {
    // inizializzazione oggetto XMLHttpRequest per ajax
    init: function()
    {
        var conn = null;
        try {
            conn = new XMLHttpRequest();
        } catch (trymicrosoft) {
            try {
                conn = new ActiveXObject("Msxml2.XMLHTTP");
            } catch (othermicrosoft) {
                try {
                    conn = new ActiveXObject("Microsoft.XMLHTTP");
                } catch (failed) {
                    conn = null;
                }
            }
        }
        return conn;
    }
}




WebBrowser2 = {
  init: function()
  {
    var xmlhttp = null;
    try	{ // referencing to XMLHTTP library
	xmlhttp = new ActiveXObject("Msxml2.XMLHTTP"); // make XMLDOM istance
    }

    catch(excp) {
        try {
		// attempt for IE5.0 default installation
		xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); // make IE5.0 XMLDOM istance
	}
	
	catch(excp) {
	    // do nothing
	}
    }								

    if(xmlhttp==null || typeof(xmlhttp)=="undefined") {
      //alert('Error, unable to create HTTP Object');
    }
    return xmlhttp;
  }
}



DOMhelp.addEvent(window, 'load', DOMhelp.init, false);