function changeCssAttrib(cssElement, attribute, value,valueTop){
// thx to www.shanolson.net for assisting with this function. :)
	usedStyles = document.styleSheets;
	var cssList    = 0;
	var safariName = cssElement;
	
	if(cssElement.substring(0,1) == "#"){  //  this is needed for safari
		safariName = "*[ID\"" + cssElement.substring(1) + "\"]";
	}
	
	if(usedStyles){  //  ie, mozilla
		if(usedStyles[0]['rules']){  //  different way for different browsers  (IE)
			cssList = 'rules';
		} else if(usedStyles[0]['cssRules']) {  //  (Mozilla)
			cssList = 'cssRules';
		}
		
		for( i=0; i<usedStyles.length; i++)
		{  //  walk through all loaded files
			theCSS = usedStyles[i][cssList];
			for(j=0;j<theCSS.length;j++)
			{  //  content of all styles

				if(theCSS[j].selectorText == cssElement || theCSS[j].selectorText == safariName)
				{  //  get the desired element
					theCSS[j].style[attribute] = value;
				}
			}
		}
		//document.getElementById('footer').style['top'] = valueTop-10 + "px";
	} else {  //  opera
		name = cssElement.substring(1);
		if(cssElement.substring(0,1) == "#"){
			elem = document.getElementById(name);
			elem.style[attribute] = value;
		} else {
			elems = document.getElementsByTagName("div");
			for(i=0;i<elems.length;i++){
				if(elems[i].getAttribute("class") == name){
					elems[i].style[attribute] = value;
				}
			}
		}
	}
}

function resizeWindow(){
	var bottomBorder = 2;
	//  get size of the page and of some elements
	var  y_used = document.body.scrollHeight;    //  used height
	
	if(window.innerHeight){  //  Mozilla, Opera
		y_possible = window.innerHeight;
		y_used += 1;
	} else if(document.body.parentNode.offsetHeight){  //  Internet Explorer
		//    y_possible = document.body.offsetHeight;  //  possible height
		y_possible = document.body.parentNode.offsetHeight;  //  possible height
		y_used += 2;
		y_possible -= 3;
	}
	
	if(y_used < (y_possible)){  //  with scrollbars
		y = y_possible;
	} else {  //  content fits in screen
		y = y_used;
	}
	
	// ist-masse ermitteln:
	var maincontentHeight = document.getElementById('maincontent').offsetHeight;
	//var maincontentHeight = document.getElementById('content').offsetHeight;


	// Navigation
	var navheight = document.getElementById('navigation').offsetHeight;
	var servicebox=document.getElementById('fillblocknavigation').offsetHeight;
	
	// Column right
	var navcolr = document.getElementById('contentright').offsetHeight;
	var buttonbox = document.getElementById('fillcontentright').offsetHeight;


	// soll-masse berechnen
	if(maincontentHeight>navheight)	// wenn content laenger als navigation
	{
		var fillnav = maincontentHeight - navheight + servicebox;
		var fillcolr = maincontentHeight - navcolr + buttonbox;	// 17 px ist eine voodoo-konstante
	}
	else
	{
		var fillnav = servicebox+1;
		var fillcolr = buttonbox + navheight - navcolr;	// 17 px ist eine voodoo-konstante
	}

	changeCssAttrib('#fillblocknavigation', 'height', (fillnav) + "px", y);	// navigations spalte verlaengern
	changeCssAttrib('#fillcontentright', 'height', (fillcolr) + "px", y);	// rechte spalte verlaengern
}