var message = "请输入您感兴趣的信息";

/**
 * 验证搜索表单
 */
function validateForm() {
	if (getElementByID("searchKeywords").value.substring(0,3)=='请输入') {
		alert(message);
		return false;
	}
	else if(getElementByID("searchKeywords").value == '') {
		alert(message);
		return false;
	}
	return true;
}

/**
 * 搜索分类
 */
function selectSearchPart() {
  	var ddl = document.getElementById("searchPart");
  	var index = ddl.selectedIndex;
  	var value = ddl.options[index].value;
	document.searchForm.action = value;
}