analytics/webcontent/fragments/common/resizeScrollarea.js

//    Licensed Materials - Property of IBM
//
//    IBM Cognos Products:  cpscrn

//
//    (C) Copyright IBM Corp. 2005, 2011
//
//    US Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
//
//
// Copyright (C) 2008 Cognos ULC, an IBM Company. All rights reserved.
// Cognos (R) is a trademark of Cognos ULC, (formerly Cognos Incorporated).

function adjustScrollSection(formName,top,middle,bottom,layoutCorrection) {
 
    var bottomSection = document.getElementById(bottom); 

	// Get the bottom section of the pane and add 8 pixels to the size
	// to account for the bottom edge of the panel dipping below the browser.
    var staticBottomHeight = bottomSection ? bottomSection.offsetHeight + 8 : 0;

    var formObj = document.getElementById(formName);

	// Ensure there is a scrollable section to resize.
    if(formObj)
    {

		// Get the middle section of the pane
		var scrollSection = document.getElementById(middle);

		if( scrollSection != null )
		{
			// Acquire the height of viewable area of the browser.
			var viewableHeight = 0;
		
			var db = (document.body) ? document.body : null;
			var dde = (document.documentElement) ? document.documentElement : null;
	
			if (dde && dde.clientHeight)
			{
				viewableHeight = dde.clientHeight;
			}
			else
			if (db && db.offsetHeight)
			{
				viewableHeight = db.offsetHeight;
			}
			
			// Calculate the height from the top of the middle section to the top of the viewable area.
			var staticTopHeight = scrollSection.offsetTop;
			var parentEle = scrollSection.offsetParent;
			while (parentEle != null)
			{
				staticTopHeight += parentEle.offsetTop - parentEle.scrollTop;
				parentEle = parentEle.offsetParent;
			}
	
			// Calculate the target height based on the difference between the viewable height 
			// and the heights of the areas above and below the middle section.
			var targetHeight = (viewableHeight - (staticTopHeight + staticBottomHeight));
	
			//  Must have a sizeable scroll section to work with.
			if (0 < targetHeight)
			{
				// Set up the scrollSection now.
				scrollSection.style.height = (targetHeight) + "px";
				if( typeof(layoutCorrection)!='undefined' && layoutCorrection.indexOf('HIDE_XSCROLL') > -1)
				{
					// This is required for browsers that require special processing to hide unnecessary horizontal scrollbar.
					scrollSection.style.overflowY = "auto";
					if (scrollSection.clientWidth > 0)
					{
						var barWidth = scrollSection.offsetWidth - scrollSection.clientWidth;
						if(0 < barWidth && barWidth < 20)
						{
							scrollSection.style.paddingRight = barWidth + "px";
							scrollSection.style.overflowX = "hidden";
						}
						else
						{
							scrollSection.style.overflowX = "auto";
						}
					}
				}
				else
				{
					scrollSection.style.overflow = "auto";					
				}
				if( typeof(layoutCorrection)!='undefined' && layoutCorrection.indexOf('POSN_YSCROLL') > -1)
				{
					// This is required for browsers that require special processing to effectively display vertical scrollbars.
					if( 0 < (scrollSection.offsetWidth - scrollSection.clientWidth))
						scrollSection.style.marginRight = (scrollSection.offsetWidth - scrollSection.clientWidth) + "px";
				}
			}
			else
			{
				scrollSection.style.height = "0px";
				scrollSection.style.overflow = "hidden";
			}
		}
    }
}