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- <script type="text/javascript">
- tekst="Obiekty jezyka JS"
- d1=tekst.lenght
- document.write("Dlugosc tekstu: " + d1 + "<br>");
- x=tekst.substring(3,7);
- document.write("Litery: " + x + "<br>");
- document.write(tekst.toUpperCase() + "<br>");
- document.write(tekst.toLowerCase() + "<br>");
- String.prototype.duzaLitera=function()
- {
- return this.charAt(0).toUpperCase() + this.substr(1);
- }
- var tx1="komputer";
- document.write(tx1.duzaLitera());
- </script>
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