function occ (catID) {
	
	var str="";
	var x = document.getElementById("openCategory");
	var y = document.getElementById("requestCategory");
	var arrowAreaObject = document.getElementById("arrowArea" + catID);
	var categoryNameAreaObject = document.getElementById("categoryNameArea" + catID);
	var subCategoryAreaTable = document.getElementById("subCategoryArea" + catID);

	if ( x.value == '') {
		
		arrowAreaObject.style.backgroundImage = "url(images/mBg2.jpg)";
		categoryNameAreaObject.className = "12white";
		//categoryNameAreaObject.style = "categoryNameStyleOpen";
		subCategoryAreaTable.style.display=""+str+"";
		
		x.value = catID;
	
	} else {
		
		if ( x.value == catID ) {
			
			arrowAreaObject.style.backgroundImage = "url(images/mBg1.jpg)";
			subCategoryAreaTable.style.display="none";
			categoryNameAreaObject.className = "12black";
			
			x.value = "";
			
		} else {
			
			var x2 = document.getElementById("arrowArea" + x.value);
			var y2 = document.getElementById("subCategoryArea" + x.value);
			var categoryNameAreaObject2 = document.getElementById("categoryNameArea" + x.value);
			
			x2.style.backgroundImage = "url(images/mBg1.jpg)";
			y2.style.display="none";	
			categoryNameAreaObject2.className = "12black";
			
			arrowAreaObject.style.backgroundImage = "url(images/mBg2.jpg)";
			categoryNameAreaObject.className = "12white";
			subCategoryAreaTable.style.display=""+str+"";	
			
			x.value = catID;
			
		}
		
	}
			
}