function chng(icon){
document.getElementById(icon).src = root+"images/"+icon+"_o.gif";
}
function unchng(button){
document.getElementById("printicon").src = root+"images/printicon.gif";
document.getElementById("homeicon").src = root+"images/homeicon.gif";
document.getElementById("sitemapicon").src = root+"images/sitemapicon.gif";
document.getElementById("contacticon").src = root+"images/contacticon.gif";
if(button != undefined){
document.getElementById(button).style.background = "url("+root+"images/button.jpg)";
}
}
function btnchng(button){
document.getElementById(button).style.background = "url("+root+"images/button_o.jpg)";
}
function checkcolumn(){
  var spalten ="false";
  var totaltable = document.getElementsByTagName("table").length;
  for (var i=0;i<=totaltable-1;i++){
    if(document.getElementsByTagName("table")[i].id.indexOf("spalten")==-1 && spalten != "true"){
    	//console.log(i);
      document.getElementById("container").style.backgroundImage="url("+root+"images/mainbg2.jpg)"
      document.getElementById("header").style.backgroundImage="url("+root+"images/mainbg2.jpg)";

    }else{
 spalten = "true";
      document.getElementById("container").style.backgroundImage="url("+root+"images/mainbg.jpg)"
      document.getElementById("header").style.backgroundImage="url("+root+"images/mainbg.jpg)"
    }
  }
}