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 html 中的factsc被点击“yes”，我想给adddetails一个特定的值。

在 html 方面，我这样调用该函数..

onsubmit="return varReplace(this.form)"

但是它不起作用..任何帮助将不胜感激!提前致谢!

Answer 1

您的函数没有返回任何内容。

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.