var iBarMark;
iBarMark = barMark.offsetTop;
iBarMark = iBarMark - 300;

var lastScrollY;
lastScrollY = 0;

var first=true;

function Pulse() {


    if(first)
    {
        lycoord=1;
    }
    else
    {
	    lycoord = document.body.scrollTop; 
	}
	if (lycoord != lastScrollY) {

			percent = .1 * (lycoord - lastScrollY);
			
			if (percent > 0) {
				percent = Math.ceil(percent);
			} else {
				percent = Math.floor(percent);
			}
			
			var iMainMenuTop,iMainMenuTopCur,iDifference;
			
			iMainMenuTopCur = document.all.MainMenu.style.pixelTop;
			
			iDifference = iBarMark - iMainMenuTopCur;
			
			iMainMenuTop = document.all.MainMenu.style.pixelTop + percent;	
            
            iTopDiff = 291 - iMainMenuTopCur;
            
            iTopDiff += 15;

				
			if (iMainMenuTop >= iBarMark) {			
				document.all.MainMenu.style.pixelTop += iDifference;
				lastScrollY = lastScrollY + iDifference;
			} else if (lycoord <= 291) {
				document.all.MainMenu.style.pixelTop += iTopDiff;
				lastScrollY = lastScrollY + iTopDiff;
			} else {
				document.all.MainMenu.style.pixelTop += percent;
				lastScrollY = lastScrollY + percent;
			}
			
			if(first)
			{
			  first=false;
			  document.all.MainMenu.style.display='inline';
			}
	}
}