javascript - 在 onsubmit 中调用 javascript 函数

Question

所以我在javascript中定义了这个函数..

function varReplace(formid)
{
    if (formid.factsc[0].checked == true) {
        formid.adddetails.value == "it's working";
    }
    else {
        formid.adddetails.value == "it's not working";
    }
}   

如果在 html 中的 factc 单击"is"，我想给 adddetails 一个特定的值。

在 html 端，我这样调用函数..

onsubmit="return varReplace(this.form)"

但它不起作用.. 任何帮助将不胜感激!提前致谢!

Answer 1

你没有从你的函数中返回任何东西。

Note that in order to cancel the submit event, the onSubmit should be in the form onSubmit="return expression". "return" indicates that the value of the expression should be returned to the submit routine. If the expression evaluates to false, the submit routine is cancelled; if it is true, the submit routine goes forward.