function textb(abj) {
	var aa = document.getElementById(abj);
	if (aa.value == "搜尋您想知道的") {
		aa.value ="";
		aa.style.color ="#000";
		}
	}
function texta(abj) {
	var aa = document.getElementById(abj);
	if (aa.value == "") {
		aa.value ="搜尋您想知道的";
		aa.style.color ="#dbd9da"
		}
	}