var PageStretcher = new Class({ stretchElement: null, footerElement: null, initialize: function(id,footer_id) { this.stretchElement = document.id(id); this.footerElement = document.id(footer_id); if (!this.stretchElement) { return; } window.addEvent('resize', function(e) { this.stretchPage(); }.bind(this)); window.addEvent('load', function(e) { this.stretchPage(); }.bind(this)); }, stretchPage: function() { var height; if (!this.stretchElement) { return; } var lowestNode = 0; var sib = this.stretchElement.previousSibling; while ( sib ) { if ( sib.nodeType == 1 ) { lowestNode = Math.max( lowestNode, this.getLowest( sib ) ); } sib = sib.previousSibling; } var minHeight = 1; if ( lowestNode > this.stretchElement.getCoordinates().top ) { minHeight = lowestNode - this.stretchElement.getCoordinates().top; } height = window.getHeight() - this.stretchElement.getCoordinates().top; if (this.footerElement) { height += (this.footerElement.getCoordinates().top - this.footerElement.getCoordinates().bottom); } height -= 30; if (height < minHeight) { height = minHeight; } this.stretchElement.setStyle( 'height',height); }, getLowest: function( topNode ) { if (topNode.style.display == 'none' || topNode.style.position == 'absolute' || topNode.style.position == 'fixed') { return 0; } var coords; if ( topNode.id ) { coords = $(topNode).getCoordinates(); } else { return 0; } var maxBottom = coords.bottom ; if (coords.height != topNode.clientHeight ) { //this is a scroll element, don't check any chidlren. return maxBottom; } var child = topNode.firstChild; while( child ) { if ( child.nodeType == 1 ) { maxBottom = Math.max( maxBottom, this.getLowest( child ) ); } child = child.nextSibling; } return maxBottom; } });

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