[Javascript] Ändra style.display på en div och en annan div scrollar tillbaka

function viewer_toggleWindow(id) {
	var c = document.getElementById(id);
	
	if( c == null ) { return; }
	
	if( c.style.display === "block" ) {
		c.style.display = "none";
	} else {
		c.style.display = "block";
	}
}

<div id="content">
 ...
 <span onclick="viewer_toggleWindow('myWindow1')">Window 1</span>
 <div id="myWindow1">...</div>
 <div id="OtherStuff">...</div>
</div>