1function isIE(){
2    var browser = new Object();
3    browser.version = parseInt(navigator.appVersion);
4    browser.isNs = false;
5    browser.isIe = false;
6    if(navigator.appName.indexOf("Netscape") != -1)
7        browser.isNs = true;
8    else if(navigator.appName.indexOf("Microsoft") != -1)
9        browser.isIe = true;
10    if(browser.isNs) return false;
11    else if (browser.isIe) return true;
12}
13
14function add(out,in1,in2,in3,in4) {
15    var Total;
16    Total=in1.value+"."+in2.value+"."+in3.value+"."+in4.value;
17    out.value=Total;
18}
19
20function load4(Mydata,ip1,ip2,ip3,ip4) {
21    var len; var ad; var temp;
22    var Myall;
23    Myall=Mydata.value;    //ip1
24    len=Myall.length;
25    temp=Myall.indexOf(".");
26    ad=Myall.substring(0,temp);
27    ip1.value=ad;
28    //ip2
29    Myall=Myall.substring(temp+1,len);
30    len=Myall.length;
31    temp=Myall.indexOf(".");
32    ad=Myall.substring(0,temp);
33    ip2.value=ad;
34    //ip3
35    Myall=Myall.substring(temp+1,len);
36    len=Myall.length;
37    temp=Myall.indexOf(".");
38    ad=Myall.substring(0,temp);
39    ip3.value=ad;
40    //ip4
41    Myall=Myall.substring(temp+1,len);
42    ad=Myall; ip4.value=ad;
43}