function mkdiv ( ) {

		var _1 = document.getElementById('navigatio_levis');
		var _2 = document.getElementById('text');
		var _3 = document.getElementById('extra');

		if ( window.getComputedStyle ) {

			//Hook for the good browsers

			var myHeights = new Array();

			var style1 = document.defaultView.getComputedStyle ( _1, "");
			var style2 = document.defaultView.getComputedStyle ( _2, "");
			var style3 = document.defaultView.getComputedStyle ( _3, "");

			myHeights[0] = parseInt( style1.getPropertyValue('height') );
			myHeights[1] = parseInt( style2.getPropertyValue('height') );
			myHeights[2] = parseInt( style3.getPropertyValue('height') );

 			//Variante 1 - Navigation und Gadgetleiste gleiche Höhe
//			if ( myHeights[0] > myHeights[2] ) {
// 
// 				_3.style.height = myHeights[0];
// 
// 			}
// 
// 			if ( myHeights[0] > myHeights[1] ) {
// 
// 				_2.style.height = myHeights[0] - 20;
// 
// 			}

			//Variante 2 - Alle Felder gleiche Höhe

			//Sorting descending - myHeights[0] holds maximum then
			myHeights.sort(function sortNumber(a,b) { return b - a;});

			var extend = myHeights[0] + 20;

			_1.style.height = extend + 'px';
			_2.style.height = myHeights[0] + 'px';
			_3.style.height = extend + 'px';

		}
		
		else if ( _1.currentStyle ) {

			// Position bei IE mit currentStyle ermitteln.
			var myHeights = new Array();

			myHeights[0] = _1.clientHeight;
			myHeights[1] = _2.clientHeight;
			myHeights[2] = _3.clientHeight;

			myHeights.sort(function sortNumber(a,b) { return b - a;});

			_1.style.height = myHeights[0] + 20;
			_2.style.height = myHeights[0];
			_3.style.height = myHeights[0] + 20;

		}

}