function tabInit() {
	var divArray = document.getElementsByTagName("DIV");
	
	for(var i=0; i < divArray.length; i++) {
		if(divArray[i].className == "themenplan_block") {
			
			var innerDivArray = divArray[i].getElementsByTagName("DIV");
			for(var j=0; j < innerDivArray.length; j++) {
				if(innerDivArray[j].className == "header") {
					innerDivArray[j].style.textDecoration = "underline";
					innerDivArray[j].parentNode.onclick = function() {
						for(var d = 0; d < this.parentNode.getElementsByTagName("TABLE").length; d++) {
							this.parentNode.getElementsByTagName("TABLE")[d].style.display = "none";
							this.parentNode.getElementsByTagName("TABLE")[d].parentNode.parentNode.style.cursor = "pointer";
						}
						this.getElementsByTagName("TABLE")[0].style.display = "";
						this.style.cursor = "default";
					}
					innerDivArray[j].parentNode.style.cursor = "pointer";
				}
			}
			
			divArray[i].getElementsByTagName("TABLE")[0].style.display = "none";
			
		}
	}
}