var maxImgId = 11;


function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
    	if (oldonload) {
    	  oldonload();
    	}
    	func();
    }
  }
}

function teaserImage() 
{
var tgt = document.getElementById('teaser');
	var pic = Math.floor(Math.random()*maxImgId) + 1;
	if(document.URL.split("?")[1]=="id=2599"){
		tgt.style.backgroundImage = "url(/fileadmin/uk_template_2010/_img/_teaser/conference.jpg)";
	}else if(document.URL.split("?")[1]=="id=2265" || document.URL.split("?")[1]=="id=grnedamendarunter0"){
		tgt.style.backgroundImage = "url(/fileadmin/uk_template_2010/_img/_teaser/gruene_damen.jpg)";
	}else{
		tgt.style.backgroundImage = "url(/fileadmin/uk_template_2010/_img/_teaser/uk_essen_"+pic+".jpg)";
	}
}

addLoadEvent(teaserImage);