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74 lines
1.9 KiB
74 lines
1.9 KiB
13 years ago
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/*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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14 years ago
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function addChar(input, character) {
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if(input.value == null || input.value == "0")
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input.value = character
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else
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input.value += character
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}
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function cos(form) {
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form.display.value = Math.cos(form.display.value);
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}
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function sin(form) {
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form.display.value = Math.sin(form.display.value);
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}
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function tan(form) {
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form.display.value = Math.tan(form.display.value);
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}
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function sqrt(form) {
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form.display.value = Math.sqrt(form.display.value);
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}
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function ln(form) {
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form.display.value = Math.log(form.display.value);
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}
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function exp(form) {
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form.display.value = Math.exp(form.display.value);
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}
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function deleteChar(input) {
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input.value = input.value.substring(0, input.value.length - 1)
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}
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function changeSign(input) {
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if(input.value.substring(0, 1) == "-")
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input.value = input.value.substring(1, input.value.length)
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else
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input.value = "-" + input.value
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}
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function square(form) {
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form.display.value = eval(form.display.value) * eval(form.display.value)
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}
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function checkNum(str) {
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for (var i = 0; i < str.length; i++) {
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var ch = str.substring(i, i+1)
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if (ch < "0" || ch > "9") {
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if (ch != "/" && ch != "*" && ch != "+" && ch != "-" && ch != "."
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&& ch != "(" && ch!= ")") {
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$("#display").text("ERROR");
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return false
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}
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}
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}
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return true
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}
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