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63 lines
1.3 KiB
63 lines
1.3 KiB
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 compute(calc) {
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$("#display").text(eval(calc));
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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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alert("invalid entry!")
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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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