Q1145 Is there any way of validating a form on a page without using the name attribute in the form tag?

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You can access forms using their position within the document forms array using their index:

document.forms[0]; // - first form in page
document.forms[1]; // - second form in page
document.forms[document.forms.length-1]; // - last form in page 

From a form field (but not the form tag itself) you can also use this.form to refer to the specific form object:

<form>
<input type="button" onClick="functionName(this.form)">
</form> 

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