// JavaScript Document
/* Script by: www.jtricks.com 
 * Version: 20071210 
 * Latest version: 
 * www.jtricks.com/javascript/navigation/floating.html 
 */  
 var floatingMenuId = 'leftmenu';
 mnuleft = parseInt(document.getElementById("leftmenu").style.left);
 var floatingMenu =  
 {  
 	 
     targetX: mnuleft,  
     targetY: 100,  
   
     hasInner: typeof(window.innerWidth) == 'number',  
     hasElement: document.documentElement  
         && document.documentElement.clientWidth,  
   
     menu:  
         document.getElementById  
         ? document.getElementById(floatingMenuId)  
         : document.all  
           ? document.all[floatingMenuId]  
           : document.layers[floatingMenuId]  
 };  
   
 floatingMenu.move = function ()  
 {  
     if (document.layers)  
     {  
         floatingMenu.menu.left = floatingMenu.nextX;  
         floatingMenu.menu.top = floatingMenu.nextY;  
     }  
     else  
     {  
         floatingMenu.menu.style.left = floatingMenu.nextX + 'px';  
         floatingMenu.menu.style.top = floatingMenu.nextY + 'px';  
     }  
 }  
   
 floatingMenu.computeShifts = function ()  
 {  
     var de = document.documentElement;  
   
     floatingMenu.shiftX =  
         floatingMenu.hasInner  
         ? pageXOffset  
         : floatingMenu.hasElement  
           ? de.scrollLeft  
           : document.body.scrollLeft;  
     if (floatingMenu.targetX < 0)  
     {  
         if (floatingMenu.hasElement && floatingMenu.hasInner)  
         {  
             // Handle Opera 8 problems  
             floatingMenu.shiftX +=  
                 de.clientWidth > window.innerWidth  
                 ? window.innerWidth  
                 : de.clientWidth  
         }  
         else  
         {  
             floatingMenu.shiftX +=  
                 floatingMenu.hasElement  
                 ? de.clientWidth  
                 : floatingMenu.hasInner  
                   ? window.innerWidth  
                   : document.body.clientWidth;  
         }  
     }  
   
     floatingMenu.shiftY =   
         floatingMenu.hasInner  
         ? pageYOffset  
         : floatingMenu.hasElement  
           ? de.scrollTop  
           : document.body.scrollTop;  
     if (floatingMenu.targetY < 0)  
     {  
         if (floatingMenu.hasElement && floatingMenu.hasInner)  
         {  
             // Handle Opera 8 problems  
             floatingMenu.shiftY +=  
                 de.clientHeight > window.innerHeight  
                 ? window.innerHeight  
                 : de.clientHeight  
         }  
         else  
         {  
             floatingMenu.shiftY +=  
                 floatingMenu.hasElement  
                 ? document.documentElement.clientHeight  
                 : floatingMenu.hasInner  
                   ? window.innerHeight  
                   : document.body.clientHeight;  
         }  
     }  
 }  
   
 floatingMenu.doFloat = function()  
 {  
     var stepX, stepY;  
   
     floatingMenu.computeShifts();  
   
     stepX = (floatingMenu.shiftX +   
         floatingMenu.targetX - floatingMenu.nextX) * .07;  
     if (Math.abs(stepX) < .5)  
     {  
         stepX = floatingMenu.shiftX +  
             floatingMenu.targetX - floatingMenu.nextX;  
     }  
   
     stepY = (floatingMenu.shiftY +   
         floatingMenu.targetY - floatingMenu.nextY) * .07;  
     if (Math.abs(stepY) < .5)  
     {  
         stepY = floatingMenu.shiftY +   
             floatingMenu.targetY - floatingMenu.nextY;  
     }  
   
     if (Math.abs(stepX) > 0 ||  
         Math.abs(stepY) > 0)  
     {  
         floatingMenu.nextX += stepX;  
         floatingMenu.nextY += stepY;  
         floatingMenu.move();  
     }  
   
     setTimeout('floatingMenu.doFloat()', 20);  
 };  
   
 // addEvent designed by Aaron Moore  
 floatingMenu.addEvent = function(element, listener, handler) {  
     if(typeof element[listener] != 'function' ||   
        typeof element[listener + '_num'] == 'undefined')  
     {  
         element[listener + '_num'] = 0;  
         if (typeof element[listener] == 'function')  
         {  
             element[listener + 0] = element[listener];  
             element[listener + '_num']++;  
         }  
         element[listener] = function(e)  
         {  
             var r = true;  
             e = (e) ? e : window.event;  
             for(var i = element[listener + '_num'] -1; i >= 0; i--)  
             {  
                 if(element[listener + i](e) == false)  
                     r = false;  
             }  
             return r;  
         }  
     }  
   
     //if handler is not already stored, assign it  
     for(var i = 0; i < element[listener + '_num']; i++)  
         if(element[listener + i] == handler)  
             return;  
     element[listener + element[listener + '_num']] = handler;  
     element[listener + '_num']++;  
 };  
   
 floatingMenu.init = function() {  
     floatingMenu.initSecondary();  
     floatingMenu.doFloat();  
 };  
   
 // Some browsers init scrollbars only after  
 // full document load.  
 floatingMenu.initSecondary = function() {  
     floatingMenu.computeShifts();  
     floatingMenu.nextX = floatingMenu.shiftX +  
         floatingMenu.targetX;  
     floatingMenu.nextY = floatingMenu.shiftY +  
         floatingMenu.targetY;  
     floatingMenu.move();  
 }  
   
 if (document.layers) {
     floatingMenu.addEvent(window, 'onload', floatingMenu.init);  
 } else {  
     floatingMenu.init();  
     floatingMenu.addEvent(window, 'onload',  
         floatingMenu.initSecondary);  
 }