var code=new Array(); //在全局 定义验证码
function createCode(id){ 
code = "";
var codeLength = 4;//验证码的长度
var checkCode = document.getElementById(id);
checkCode.value = "";
var selectChar = new Array(0,1,2,3,4,5,6,7,8,9);
for(var i=0;i<codeLength;i++) {
   var charIndex = Math.floor(Math.random()*10);
   code +=selectChar[charIndex];
}
if(code.length != codeLength){
   createCode();
}
checkCode.value = code;
//alert(document.sitevote3.checkCode3.value);
}

function IfIe()
{
	if(navigator.appName != "Microsoft Internet Explorer") {
		alert("please use Internet Explorer to vote for us~");
		return false;
	}
	return true;
}
function onVote(form)
{
var code;
var inputCode;
switch(form) {
case "1":
case 1:
	name = document.sitevote1.char.value;
	code = document.sitevote1.checkCode.value;	
	inputCode = document.sitevote1.code.value;
	break;
case "2":
case 2:
	name = document.sitevote2.char.value;
	code = document.sitevote2.checkCode.value;	
	inputCode = document.sitevote2.code.value;
	break;
case "3":
case 3:
	name = document.sitevote3.char.value;
	code = document.sitevote3.checkCode.value;	
	inputCode = document.sitevote3.code.value;
	break;
case "4":
case 4:
	name = document.sitevote4.char.value;
	code = document.sitevote4.checkCode.value;	
	inputCode = document.sitevote4.code.value;
	break;
default :
	name = document.sitevote1.char.value;
	code = document.sitevote1.checkCode.value;	
	inputCode = document.sitevote1.code.value;
	break;
}
if (name == "") {
	alert("please insert u char!");
	return false;
}
if(inputCode != code ){
	alert("please insert into current code!");
	return false;
}
}