function validateLoginForm(form){
	var username = form.userName;
	var password = form.password;
	var validateCode = form.validateCode;
	var buffer = new Array();
	var fieldName = "";
	if( username.value == "" ){
		buffer.push("请输入用户名或者邮箱地址！");
		if( fieldName == "" ){
			fieldName = username.name;
		}										
	}
	if( password.value == "" ){				 
		buffer.push("请输入密码！");
		if( fieldName == "" ){
			fieldName = password.name;
		}				
	}
	if( validateCode.value == "" ){			 
		buffer.push("请输入验证码！"); 
		if( fieldName == "" ){
			fieldName = validateCode.name;
		}	
	}
	if( buffer.length > 0 ){
		alert(buffer.join("\n\n"));
		form.elements[fieldName].focus();
		return false;
	}
	return true;
}
			
var message = "请输入您感兴趣的信息";

var first = 1;

/**
 * 搜索条焦点进入
 */
function searchOnfocus() {
	if (first == 1) {
		getElementByID("searchKeywords").value = "";
		first ++;
		return;
	}
	else {
		return;
	}
}

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

/**
 * 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;
}