if (document.getElementById("overlay"))
{
 var hw = getSize();
 var v = document.getElementsByTagName("html")[0].scrollHeight;
// alert(v);
 document.getElementById("overlay").style.height = v+"px";
}

/****************************************************/
function getSize()
{
 var myWidth = 0, myHeight = 0;
 if( typeof( window.innerWidth ) == 'number' )
 {
  myWidth = window.innerWidth;        //Non-IE
  myHeight = window.innerHeight;
 } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
  myWidth = document.documentElement.clientWidth;        //IE 6+ in 'standards compliant mode'
  myHeight = document.documentElement.clientHeight;
 } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
  myWidth = document.body.clientWidth;        //IE 4 compatible
  myHeight = document.body.clientHeight;
 }
// return [ myWidth, myHeight ];
}

/****************************************************/
function getScrollXY()
{
 var scrOfX = 0, scrOfY = 0;
 if( typeof( window.pageYOffset ) == 'number' )
 {
  scrOfY = window.pageYOffset;  //Netscape compliant
  scrOfX = window.pageXOffset;
 } else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
  scrOfY = document.body.scrollTop;  //DOM compliant
  scrOfX = document.body.scrollLeft;
 } else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
  scrOfY = document.documentElement.scrollTop;  //IE6 standards compliant mode
  scrOfX = document.documentElement.scrollLeft;
 }
 return [ scrOfX, scrOfY ];
}

/****************************************************/
function bild_show(name)
{
 document.getElementById("overlay").style.display="inline";
 document.getElementById("innerlay").innerHTML = '';
}

/****************************************************/
function bild_hide()
{
 document.getElementById("overlay").style.display="none";
 document.getElementById("innerlay").innerHTML = "";
}