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Stop javascript runtime functions

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[前端(javascript) 所属分类 前端(javascript) | 发布者 店小二03 | 时间 2018 | 作者 红领巾 ] 0人收藏点击收藏

I have a few validations happening in the first step of a form.

When the next button is clicked, an age verification is run, if it is true then it runs three functions.

function checkAge(form) { return false; } else { validate('theForm','email'); hideFormOne(); showPartTwo(); return false; };

and the function is

function validate(form_id,email){ var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/; var address = document.forms[form_id].elements[email].value; if(reg.test(address) == false) { alert('Invalid Email Address'); return false; } } function hideFormOne(container1) { document.getElementById('container1').style.display='none'; } function showPartTwo(container2) { document.getElementById('container2').style.display='block'; }

My problem is, if the email is invalid, the alert pops up, but then when that is closed it continues to run the hide and show functions. I need it to only run the hide/show functions if the email is valid.

Since your validate function returns true or false, you can use that value to decide what to do after the function has executed.

if(validate('theForm', 'email')) { hideFormOne(); showPartTwo(); }

The above is a terse way of writing

var isValid = validate('theForm', 'email'); if(isValid) { hideFormOne(); showPartTwo(); }

... where isValid gets the value that is returned from validate

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