<!-- TWO STEPS TO INSTALL : 1. Add the last code into the BODY of your HTML document --> <head> <style> input {width: 50;} </style> <SCRIPT LANGUAGE="JavaScript"> <!-- function addChar(input, character) { if(input.value == null || input.value == "0") input.value = character else input.value += character } function cos(form) { form.display.value = Math.cos(form.display.value);} function sin(form) { form.display.value = Math.sin(form.display.value);} function tan(form) { form.display.value = Math.tan(form.display.value);} function sqrt(form) { form.display.value = Math.sqrt(form.display.value);} function ln(form) { form.display.value = Math.log(form.display.value);} function exp(form) { form.display.value = Math.exp(form.display.value);} function sqrt(form) { form.display.value = Math.sqrt(form.display.value);} function deleteChar(input) { input.value = input.value.substring(0, input.value.length - 1) } function changeSign(input) { if(input.value.substring(0, 1) == "-") input.value = input.value.substring(1, input.value.length) else input.value = "-" + input.value } function compute(form) { form.display.value = eval(form.display.value)} function square(form) { form.display.value = eval(form.display.value) * eval(form.display.value)} function checkNum(str) { for (var i = 0; i < str.length; i++) { var ch = str.substring(i, i+1) if (ch < "0" || ch > "9") { if (ch != "/" && ch != "*" && ch != "+" && ch != "-" && ch != "." && ch != "(" && ch!= ")") { alert("invalid entry!") return false } } } return true } // --> </SCRIPT> <meta name="MSSmartTagsPreventParsing" content="TRUE"> </head> <p align="center"><strong>Калькулятор</strong></p> <BODY bgcolor="#ffffff"> <CENTER> <FORM> <table border=10 style="BACKGROUND-COLOR: #CC99FF;"><tr><td colspan=5> <input name="display" style="BACKGROUND-COLOR: #FFCC00; COLOR: #0000FF; FONT-STYLE: bold; width:272; height:30" value="0" size=25> <tr> <td><input type="button" value=" exp " onClick="if (checkNum(this.form.display.value)) { exp(this.form) }"></td> <td><input type="button" value=" 7 " onClick="addChar(this.form.display, '7')"></td> <td><input type="button" value=" 8 " onClick="addChar(this.form.display, '8')"></td> <td><input type="button" value=" 9 " onClick="addChar(this.form.display, '9')"></td> <td><input type="button" value=" / " onClick="addChar(this.form.display, '/')"></td> </tr><tr> <td><input type="button" value=" ln " onClick="if (checkNum(this.form.display.value)) { ln(this.form) }"></td> <td><input type="button" value=" 4 " onClick="addChar(this.form.display, '4')"></td> <td><input type="button" value=" 5 " onClick="addChar(this.form.display, '5')"></td> <td><input type="button" value=" 6 " onClick="addChar(this.form.display, '6')"></td> <td><input type="button" value=" * " onClick="addChar(this.form.display, '*')"></td> </tr><tr> <td><input type="button" value=" sqrt " onClick="if (checkNum(this.form.display.value)) {cos(this.form) }"></td> <td><input type="button" value=" 1 " onClick="addChar(this.form.display, '1')"></td> <td><input type="button" value=" 2 " onClick="addChar(this.form.display, '2')"></td> <td><input type="button" value=" 3 " onClick="addChar(this.form.display, '3')"></td> <td><input type="button" value=" - " onClick="addChar(this.form.display, '-')"></td> </tr><tr> <td><input type="button" value=" sq " onClick="if (checkNum(this.form.display.value)) { square(this.form) }"></td> <td><input type="button" value=" 0 " onClick="addChar(this.form.display, '0')"></td> <td><input type="button" value=" . " onClick="addChar(this.form.display, '.')"></td> <td><input type="button" value=" +/- " onClick="changeSign(this.form.display)"></td> <td><input type="button" value=" + " onClick="addChar(this.form.display, '+')"></td> </tr><tr> <td><input type="button" value=" Pi " onClick="addChar(this.form.display, Math.PI)"></td> <td><input type="button" value="sqrt 2" onClick="addChar(this.form.display, Math.SQRT2)"></td> <td><input type="button" value="E" onClick="addChar(this.form.display, Math.E)"></td> <td><input type="button" value="ln2" onClick="addChar(this.form.display, Math.LN2)"></td> <td><input type="button" value="ln10" onClick="addChar(this.form.display, Math.LN10)"></td> </tr><tr> <td><input type="button" value=" ( " onClick="addChar(this.form.display, '(')"></td> <td><input type="button" value=" cos " onClick="if (checkNum(this.form.display.value)) { cos(this.form) }"></td> <td><input type="button" value=" sin " onClick="if (checkNum(this.form.display.value)) {sin(this.form) }"></td> <td><input type="button" value=" tan " onClick="if (checkNum(this.form.display.value)) { tan(this.form) }"></td> <td><input type="button" value=" ) " onClick="addChar(this.form.display, ')')"></td> </tr><tr> <td><input type="button" value="Очистить" onClick="this.form.display.value = 0 "></td> <td><input type="button" value="<-" onClick="deleteChar(this.form.display)"></td> <td colspan=3><input type="button" style="width:163" value="Считать" name="enter" onClick="if (checkNum(this.form.display.value)) { compute(this.form) }"></td> </tr> </FORM> </td></tr></table> </CENTER> <!-- Script Size: 4.63 KB --> <!-- copyright (i4) --><div align="center"><a href="http://www.ucoz.ru/" title="Создать сайт бесплатно"><img style="margin:0;padding:0;border:0;" alt="Hosted by uCoz" src="http://s201.ucoz.net/img/cp/8.gif" width="80" height="15" title="Hosted by uCoz" /></a><br /></div><!-- /copyright --> </body> </font>
( Dolmetscher ?) 
(Переводчик?)
