$("*").css("overflow","hidden") // stops
everything from scrolling
$("*").css("overflow","") // undoes it.
$("*") is like taking a sledgehammer to the problem, If you know the proper element that is scrolling use it.
JΛ̊KE
PS
If you use document.scrollingElement, it works…
$(document.scrollingElement).css("overflow","hidden")
$(document.scrollingElement).css("overflow","")
Or toggle a CSS class that just has overflow:hidden;