function displayhide(x,y,z,a,b) {
         var oneObj = document.getElementById(x).value;
         var twoObj = document.getElementById(y);
			var threeObj = document.getElementById(z);

			

			if (oneObj == "AU"){
				twoObj.style.display = "none";
				document.getElementById(a).value = "";
				threeObj.style.display = "inline";
				}
			else{
				twoObj.style.display = "inline";
				threeObj.style.display = "none";
				document.getElementById(b).value = "*** select ***";
				}

         }