132.125.6.155
<br>
<input type="button" value="click" onClick="get_usedipnum('132.125.6.155',5)">
<script>
function get_usedipnum(ipadd,ipnum) {
var lastNum = parseInt(ipadd.substr(ipadd.lastIndexOf(".")+1));
lastNum -= ipnum;
var newIp = ipadd.substring(0,ipadd.lastIndexOf(".")+1) + lastNum;
alert(newIp);
}
</script>
<br>
<input type="button" value="click" onClick="get_usedipnum('132.125.6.155',5)">
<script>
function get_usedipnum(ipadd,ipnum) {
var lastNum = parseInt(ipadd.substr(ipadd.lastIndexOf(".")+1));
lastNum -= ipnum;
var newIp = ipadd.substring(0,ipadd.lastIndexOf(".")+1) + lastNum;
alert(newIp);
}
</script>
解决方案 »
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