/* 

	Easy Scroll v1.0
	written by Alen Grakalic, provided by Css Globe (cssglobe.com)
	please visit http://cssglobe.com/post/1495/easy-scroll-accessible-content-scroller
	
 */

this.easyscroll = function(){
	
    // id of the container element 
    var id = "myContent";
	
    // navigation buttons text
    var nav = ["<<", ">", "<--"];
	
    //	id for each navigation button (OPTIONAL)
    var navId = ["btnUp", "btnDown", "btnReset"];

    // movement speed
    var speed = 8;
	
    // desired height of the container element (in pixels)
    var height = 55;
    var width = 720;
	
    //
    // END CONFIG
    // do not edit below this line (unless you want to of course :) )
    //
        
    //        var celle = document.getElementById("photos").row[0].cell[0];        
    //        celle.style.display = "none";

    
    var i = 3;
    var tab_photos = document.getElementById("photos");
//    tab_photos.style.background ="0";
//    document.getElementById("photos0").style.backgroundColor = "black";

    //alert(document.getElementById("photos4").style.width);


    var obj = document.getElementById(id);
	
    obj.up = false;
    obj.down = false;
    obj.fast = false;

    var container = document.createElement("div");
    var parent = obj.parentNode;
    container.id="easyscroll";
    parent.insertBefore(container,obj);
    parent.removeChild(obj);	
	
    container.style.position = "relative";
    container.style.height = height + "px";
    container.style.width = width + "px";
    container.style.overflow = "hidden";
    obj.style.position = "absolute";
    obj.style.top = "0";
    obj.style.left = "0";
    container.appendChild(obj);
/*/	
    var btns = new Array();
    var ul = document.createElement("ul");
    ul.id="easyscrollnav";
    for (var i=0;i<nav.length;i++){
        var li = document.createElement("li");
        li.innerHTML = nav[i];
        li.id = navId[i];
        btns.push(li);
        ul.appendChild(li);
    };
    parent.insertBefore(ul,container);
	
    btns[0].onmouseover = function(){
        obj.up = true;
        this.className = "over";
    };
    btns[0].onmouseout = function(){
        obj.up = false;
        this.className = "";
    };		
    btns[1].onmouseover = function(){
        obj.down = true;
        this.className = "over";		
    };
    btns[1].onmouseout = function(){
        obj.down = false;
        this.className = "";
    };		
    btns[0].onmousedown = btns[1].onmousedown = function(){
        obj.fast = true;
    };	
    btns[0].onmouseup = btns[1].onmouseup = function(){
        obj.fast = false;
    };		
    btns[2].onmouseover = function(){ 		
        this.className = "over";
    };	
    btns[2].onmouseout = function(){ 		
        this.className = "";
    };		
    btns[2].onclick = function(){ 		
        //		obj.style.top = "0px";
        obj.style.left = "0px";
    };	
*/
    var nav = document.getElementById('img_gestion_recule');
	nav.onmouseover = function(){
            obj.up = true;
            this.className = "over";
	};
	nav.onmouseout = function(){
            obj.up = false;
            this.className = "";
	};	
        nav.onmousedown = function(){
            obj.fast = true;
        };	
        nav.onmouseup = function(){
            obj.fast = false;
        };	

    var nav = document.getElementById('img_gestion_avance');
	nav.onmouseover = function(){
            obj.down = true;
            this.className = "over";
	};
	nav.onmouseout = function(){
            obj.down = false;
            this.className = "";
	};	
        nav.onmousedown = function(){
            obj.fast = true;
        };	
        nav.onmouseup = function(){
            obj.fast = false;
        };	

        /*/    
    var nav = document.getElementById('gestion_recule');
    var imgs = nav.getElementById('img');
    for (var i=0;i<imgs.length;i++)
    {
	imgs[i].onmouseover = function(){
            obj.up = true;
            this.className = "over";
	};
	imgs[i].onmouseout = function(){
            obj.up = false;
            this.className = "";
	};	
        imgs[i].onmousedown = function(){
            obj.fast = true;
        };	
        imgs[i].onmouseup = function(){
            obj.fast = false;
        };	
    }       
    var nav2 = document.getElementById('gestion_avance');
    var imgs2 = nav2.getElementsByTagName('img');
    for (var i=0;i<imgs2.length;i++)
    {
	imgs2[i].onmouseover = function(){
            obj.down = true;
            this.className = "over";
	};
	imgs2[i].onmouseout = function(){
            obj.down = false;
            this.className = "";
	};	
        imgs2[i].onmousedown = function(){
            obj.fast = true;
        };	
        imgs2[i].onmouseup = function(){
            obj.fast = false;
        };	
    }       
*/
	
		
    this.start = function(){				

        var newTop;
        //		var objHeight = obj.offsetHeight;
        //		var top = obj.offsetTop;
        var objHeight = obj.offsetWidth;
        var top = obj.offsetLeft;
        var fast = (obj.fast) ? 2 : 1;
        if(obj.down){		 
            //			newTop = ((objHeight+top) > height) ? top-(speed*fast) : top;	
            //			obj.style.top = newTop + "px";
            newTop = ((objHeight+top) > width) ? top-(speed*fast) : top;	
            obj.style.left = (newTop + "px");
        };	
        if(obj.up){		 
            //			newTop = (top < 0) ? top+(speed*fast) : top;
            //			obj.style.top = newTop + "px";
            newTop = (top < 0) ? top+(speed*fast) : top;
            obj.style.left = (newTop + "px");
        };
    };	
    obj.interval = setInterval("start()",50);		
		
};


//
// script initiates on page load. 
//

this.addEvent = function(obj,type,fn){
    if(obj.attachEvent){
        obj['e'+type+fn] = fn;
        obj[type+fn] = function(){obj['e'+type+fn](window.event );}
        obj.attachEvent('on'+type, obj[type+fn]);
    } else {
        obj.addEventListener(type,fn,false);
    };
};
addEvent(window,"load",easyscroll);
    

this.getpos = function(){
    var id = "myContent";
    var obj = document.getElementById(id);
    alert("valeur : " + obj.style.left);
    
    //    getXmlHttpRequest();     
        
        
    return obj.offsetWidth;
}