平时感觉windows的ip输入框很好用,如果再网页中也能实现一定是很爽的事情。核心代码如下:
<script language="javascript">
function outstr(){
if(document.all.ip1.value>0 && document.all.ip2.value>0 && document.all.ip3.value>0 && document.all.ip4.value>0){
alert("你输入的ip地址为:" + document.all.ip1.value + "." + document.all.ip2.value + "." + document.all.ip3.value + "." + document.all.ip4.value);
}//end if
}//end
function moveright(obj){
id = parseint(obj.name.substr(2,1))
if(id<4){
eval("document.all.ip" + (id +1) + ".focus()");
}else{
outstr();
}//end if
}
function moveleft(obj){
id = parseint(obj.name.substr(2,1))
if(id>1){
eval("document.all.ip" + (id -1) + ".focus()");
}//end if
}//end if
function keypress(obj){
var objinput = obj;
cod = window.event.keycode;
if(cod==46 && (obj.value).length>0){//如果按了“.”并且有了一个字符,向右移动一次
window.event.keycode=0;
moveright(obj);
}else if((obj.value).length==2 && (cod >= 48) && (cod <= 57)){//如果数字键并且够了两位
if(cod<58){//
obj.value = obj.value * 10 + cod – 48;
}//end if
window.event.keycode = 0;
moveright(obj);
}else{ //判断输入的是不是数字
if ( !(((cod >= 48) && (cod <= 57)) || (cod == 13) || (cod == 37) || (cod == 39))){
window.event.keycode = 0;
}//end if
}//end if
}//end function keydown
function getcaretpos(obj){
var currentrange=document.selection.createrange();
var workrange=currentrange.duplicate();
obj.select();
var allrange=document.selection.createrange();
var len=0;
while(workrange.compareendpoints("starttostart",allrange)>0){
workrange.movestart("character",-1);
len++;
}
currentrange.select();
return len;
}//end
function keydown(obj){
cod = window.event.keycode;
i = getcaretpos(obj); //光标位置
n = obj.value.length; //字符长度
if(cod==37 && i==0){//光标左移
moveleft(obj);
}else if(cod==39 && i>=n){
moveright(obj);
}else if(cod==8 && (obj.value=="" || i==0)){
moveleft(obj);
}//end if
}//end
function checkdate(obj,max_num){
if(obj.value>max_num || obj.value<0){
window.event.keycode = 0;
alert(obj.value + "是无效的项目,只能输入0到" + max_num + "之间的数。");
obj.value = max_num;
obj.focus();
obj.select();
}//end if
}//end
</script>
测试网址:http://yuenshui.3c21.com/test/ipv1.0.htm
源代码全部在网页中,没有任何加密,希望使用时不要去掉出处。
