在jsp页面中显示26个英文字母
<span id="showLetter"></span>
<script type="text/javascript">
var start =65, end = 90, str;
var size = 2;
var contextStr="";
for (str = start; str <= end; str++) {
var letter = String.fromCharCode(str);
contextStr+='<a href="ShowSingerServlet?opt=show&s_namefirst='+letter+'">'+letter+'</A>';
}
document.getElementById("showLetter").innerHTML=contextStr;
</script>