<script type="text/javascript">
var leftOrLight = 'left';
window.onload = function () {
setInterval(function () {
//var titleValue = document.title;//获取标题这里没有用上
var testp1 = document.getElementById('p1').value;
if (leftOrLight == 'left') {
var fistValue = testp1.charAt(0);
var others = testp1.substring(1, testp1.length);
document.getElementById('p1').value = others + fistValue;
} else {
var lastValue = testp1.charAt(testp1.length - 1);
var others = testp1.substring(0, testp1.length - 1);
document.getElementById('p1').value = lastValue + others;
}
}, 1000)
document.getElementById('left').onclick = function () {
leftOrLight = 'left';
}
document.getElementById('right').onclick = function () {
leftOrLight = 'right';
}
};
</script>
<input id="left" type="button" value="left" />
<input id="right" type="button" value="right" />
<input id="p1" type="text" value="123456789" />