function CheckLoginForm()
{
   if(document.getElementById("userid").value=="")
    {
        //alert("用户ID不能为空！");
        document.getElementById("user_show").innerHTML="<font color='red'>　用户名不能为空！</font>";
        document.all.userid.focus();
        return false;
    }
    
    if(document.getElementById("psw1").value=="")
    {
        document.getElementById("pass_show").innerHTML="<font color='red'>　密码不能为空！</font>";
        document.all.psw1.focus();
        return false;
    }
    
     if(!verifyEnglish(document.getElementById("userid").value))
	 {
	    // document.getElementById("user_show").innerHTML="<font color='red'>　用户名只能输入英文字母或数字！\r\n\r\n</font>";
	    // document.getElementById("usermail").value="";
		// document.getElementById("usermail").disabled="";
	    // document.getElementById("ImageButton1").disabled="disabled";
	     alert("用户名只能输入英文字母或数字");
		return false;
	 }
  
	 
	 if(LEN(document.getElementById("userid").value)<=3)
	 {
	     //document.getElementById("user_show").innerHTML="<font color='red'>　用户名请输入3位以上的字符！</font>";
	    // document.getElementById("usermail").value="";
		 document.getElementById("usermail").disabled="";
	    // document.getElementById("ImageButton1").disabled="disabled";
	     alert("用户名请输入3位以上的字符！");
		return false;
	 }
  
    if(!checkbadwords(document.getElementById("userid").value,"&|<>="))
    {
        
        //document.getElementById("user_show").innerHTML="<font color='red'>　用户名含有&|<>=等非法字符！</font>";
        //document.getElementById("usermail").value="";
		document.getElementById("usermail").disabled="";
       // document.getElementById("ImageButton1").disabled="disabled";
        alert("用户名含有&|<>=等非法字符！");
		return false;
    
    }
    
    
    
    return true;
}

function CheckRegFrom()
{
    if(document.getElementById("userid").value=="")
    {
        alert("用户ID不能为空！");
        document.all.userid.focus();
        return false;
    }
    
     if(document.getElementById("psw1").value=="")
    {
        alert("密码不能为空！");
        document.all.psw1.focus();
        return false;
    }
    return true;

}

function CheckCommentFrom()
{
    if(document.getElementById("userID").value=="")
    {
        alert("您的称呼不能为空！");
        document.all.userID.focus();
        return false;
    }
    
     var intlen=document.getElementById("userID").value.length;
    if (intlen>20)
    {
        alert("您的称呼不能超过20字符 ");
        document.all.userID.focus();
        return false;
    }
    
     if(document.getElementById("context").value=="")
    {
        alert("您的评论不能为空！");
        document.all.context.focus();
        return false;
    }
    intlen=document.getElementById("context").value.length;
    if (intlen>200)
    {
        alert("评论不能超过200字符 ");
        document.all.context.focus();
        return false;
    }

    return true;

}

function CheckOnlineFrom()
{
    if(document.getElementById("username").value=="")
    {
        alert("您的昵称不能为空！");
        document.all.username.focus();
        return false;
    }
    
     var intlen=document.getElementById("username").value.length;
    if (intlen>20)
    {
        alert("您的昵称不能超过20字符 ");
        document.all.username.focus();
        return false;
    }
    
     if(document.getElementById("context").value=="")
    {
        alert("您的问题不能为空！");
        document.all.context.focus();
        return false;
    }
    intlen=document.getElementById("context").value.length;
    if (intlen>200)
    {
        alert("问题不能超过200字符 ");
        document.all.context.focus();
        return false;
    }

    return true;

}

function hs(node) {
	  nodeObject1 = document.getElementById('a1');
      nodeObject2 = document.getElementById('a2');
      nodeObject3 = document.getElementById('a3');
      nodeObject4 = document.getElementById('list1');
      nodeObject5 = document.getElementById('list2');
      nodeObject6 = document.getElementById('list3');
      switch(node)
      {
		case "1":
			nodeObject1.className = 'cur';
			nodeObject2.className = '';
			nodeObject3.className = '';
			nodeObject4.style.display = '';
			nodeObject5.style.display = 'none';
			nodeObject6.style.display = 'none';				
			break;
		case "2":
			nodeObject1.className = '';
			nodeObject2.className = 'cur';
			nodeObject3.className = '';
			nodeObject4.style.display = 'none';
			nodeObject5.style.display = '';
			nodeObject6.style.display = 'none';				
			break;
		case "3":
			nodeObject1.className = '';
			nodeObject2.className = '';
			nodeObject3.className = 'cur';
			nodeObject4.style.display = 'none';
			nodeObject5.style.display = 'none';
			nodeObject6.style.display = '';					
			break;
	  }
	}