<title> Extend JavaScript Array method </title>
<script language= "JavaScript" >
<!--
Array.prototype.indexof=function (Substr,start) {
var ta,rt,d= ';
if (start!=null) {ta=this.slice (start); rt=start;} else{ta=this;rt=0;}
var str=d+ta.join (d) +d,t=str.indexof (d+substr+d);
if (t==-1) Return-1;rt+=str.slice (0,t). Replace (/[^\0]/g, '). length;
return RT;
}
Array.prototype.lastindexof=function (Substr,start) {
var ta,rt,d= ';
if (start!=null) {ta=this.slice (start); rt=start;} else{ta=this;rt=0;}
Ta=ta.reverse (); var str=d+ta.join (d) +d,t=str.indexof (d+substr+d);
if (t==-1) Return-1;rt+=str.slice (t). replace (/[^\0]/g, '). Length-2;
return RT;
}
Array.prototype.replace=function (REG,RPBY) {
var ta=this.slice (0), d= ' ";
var str=ta.join (d); Str=str.replace (REG,RPBY);
Return Str.split (d);
}
Array.prototype.search=function (reg) {
var ta=this.slice (0), d= ' ", Str=d+ta.join (d) +d,regstr=reg.tostring ();
Reg=new RegExp (Regstr.replace (/\/. | \ n) +) \/.*/g, ' \\0$1\\0 '), Regstr.slice (Regstr.lastindexof ('/') +1));
T=str.search (reg); if (t==-1) Return-1;return Str.slice (0,t). Replace (/[^\0]/g, '). length;
}
Window.onload=function () {
var a=new Array (' aa1321321 ', ' b4323424b ', ' cc345345 ', ' dd4654 ', ' dd4654 ', ' b4323424b ');
document.getElementById (' T1 '). value=a.tostring ();
document.getElementById (' T2 '). Value=a.indexof (' cc345345 ');
document.getElementById (' T3 '). Value=a.lastindexof (' dd4654 ');
document.getElementById (' T4 '). Value=a.replace (' b4323424b ', ' * ');//Replace the first b4323424b with *
document.getElementById (' T5 '). Value=a.search (/dd4654/)//Not found return-1
};
-->
</script>
<style type= "Text/css" >
<!--
input{width:600px}
-->
</style>
<body>
<table>
<tr><td> array a:</td><td><input id= "T1" type= "text"/></td></tr>
<tr><td>a.indexof (' cc345345 '): </td><td><input id= "T2" type= "text"/></td>< /tr>
<tr><td>a.lastindexof (' dd4654 '): </td><td><input id= "T3" type= "text"/></td> </tr>
<tr><td>a.replace (/\d/g, ' * '): </td><td><input id= "T4" type= "text"/></td></ Tr>
<tr><td>a.search (/dd4654/): </td><td><input id= "T5" type= "text"/></td></tr >
</table>
</body>
