How I Run Javascript Code In WordPress Page?

I want to run a loan form script in my website page. I add this

<script language="javascript">
window.lmpost = {};
window.lmpost.options = {campaignid: '223638', subid:'', testresult: '', domain: 'https://www.xxxxxxxx.com/forms/xxxxxx3/', form: '../1page_form_label_v2.3', leadtypeid: '9'};
document.write('<script id="leadsb2cformsrc" async="async" type="text/javascript" src="' + lmpost.options.domain + 'Scripts/forms.core.js"><\/script>');
</script>

Script but it can’t run. Please, suggest me whole process that work!!