var 
 
            ncontentHeight, 
            nholderHeight, 
            nscrollSize,  
            nflag = 0,
            nspeed  

         ; 

	 
         function ngetSizes() { 
            ncontentHeight = document.getElementById('nscrcont').offsetHeight; 
            nholderHeight = document.getElementById('nholder').offsetHeight; 
            nscrollSize = (ncontentHeight - nholderHeight) * -1; 
         }
		 
         function nscrollDown(nspd) { 
            var obj = document.getElementById('nscrcont'); 
            if(nflag > nscrollSize) { 
               nflag = nflag - nspd; 
               obj.style.marginTop = nflag + "px"; 
            } 
         }
		 
         function nscrollUp(nspd) { 
            var obj = document.getElementById('nscrcont'); 
            if(nflag < 0) { 
               nflag = nflag + nspd; 
               obj.style.marginTop = nflag + "px"; 
            } 
         }
		 
         function nstopScroll() { 
            nspeed = clearTimeout(nspeed); 
         } 
		 

		 
		 
 
		 
		 
		function addLoadEvent(func) { 
		
			var oldonload = window.onload;
			if (typeof window.onload != 'function') { window.onload = func; } 
			
			else {
			
				window.onload = function() {
				
					oldonload();
					func();
				}
			}
		}


		addLoadEvent(ngetSizes);