function isFrmValid(source,args) {	
	var flag,s
	var headerSep = "<b><u>Error</u></b>";
    var first = "<ul>";
    var pre = "<li>";
    var post = "</li>";
    var last = "</ul>";    
     
	s = headerSep;	 

	if (document.Form1.txtUserID.value==null || document.Form1.txtUserID.value=="") {				
		s += pre + "用戶ID必須輸入" + post;
		flag=false;	
	}
	else if(document.Form1.txtUserID.value.length < 4 || document.Form1.txtUserID.value.length > 12) {				
		s += pre + "用戶ID長度必須是4至12位" + post;
		flag=false;	
	}
	if (document.Form1.txtPwd.value==null || document.Form1.txtPwd.value=="") {				
		s += pre + "密碼必須輸入" + post;
		flag=false;	
	}
	else if(document.Form1.txtPwd.value.length < 4 || document.Form1.txtPwd.value.length > 12) {				
		s += pre + "密碼長度必須是4至12位" + post;
		flag=false;	
	}
	s+=last;
	if (flag==false) {				
		document.getElementById("lblMsg").innerHTML=s;
		args.IsValid=false;	
	}

}