js 变量问题

Question

<script>
i=1;
</script>
<input type="submit" name="Submit" value="提交" onclick="window.open('z.html?m='+i);" />
<script>
i=2;
</script>
<input type="submit" name="Submit2" value="提交" onclick="window.open('z.html?m='+i);" />
请问如何让每个i都有自己的值，现在上边i也等于2了

Answer 1

<script> 
i=1; 
</script> 
<input type="submit" name="Submit" value="提交" onclick="window.open('z.html?m='+i);" /> 
<script> 
j=2; 
</script> 
<input type="submit" name="Submit2" value="提交" onclick="window.open('z.html?m='+j);" /> 

Answer 2

<script> 
i=1;
document.write("<input type=\"submit\" name=\"Submit\" value=\"提交\" onclick=\"window.open(\'z.html?m=" + i + "\');\" />");
</script> 
<script> 
i=2; 
document.write("<input type=\"submit\" name=\"Submit2\" value=\"提交\" onclick=\"window.open(\'z.html?m=" + i + "\');\" />");
</script>