我需要一个函数来确定:(1)如果两个输入有值,则抛出错误。(2) 如果两个输入都没有值,则抛出错误。(3) 如果输入 B 或输入 D 有值,则确定然后使用哪个计算函数。两个计算函数都可以工作,当被称为
onClick="Calculate(this.form.input_A.value, this.form.input_B.value, this.form.input_C.value, this.form)"
onClick="Calculate2(this.form.input_A.value, this.form.input_C.value, this.form.input_D.value, this.form)"
但是当我用来调用下面的函数时:
onclick="compute();"
错误有效,但我没有正确调用计算函数,我确信它很明显,但我看不到它。答案不再显示,就像添加错误函数之前一样。
<SCRIPT LANGUAGE="JavaScript">
function compute() {
var B = document.getElementById("input_B").value;
var D = document.getElementById("input_D").value;
if (B != "" && D != "") {
alert("You may only enter Assessment or Annual Property Taxes.");
} else if (B != "") {
Calculate(B);
} else if (D != "") {
Calculate2(D);
} else {
alert("You must enter a value into either Assessment or Annual Property Taxes.");
}
}
function Calculate(Atext, Btext, Ctext, form) {
var A = parseFloat(Atext);
var B = parseFloat(Btext);
var C = parseFloat(Ctext);
form.Answer.value = ((B - A) * C) / 1000;
}
function Calculate2(Atext, Ctext, Dtext, form) {
var A = parseFloat(Atext);
var C = parseFloat(Ctext);
var D = parseFloat(Dtext);
form.Answer.value = D - ((A * C) / 1000);
}
function ClearForm(form) {
form.input_A.value = "";
form.input_B.value = "";
form.input_C.value = "";
form.input_D.value = "";
form.Answer.value = "";
}
</SCRIPT>