Nithya Nithya - 1 year ago 127
CSS Question

How to assign javascript variable value to HTML Attribute?

I am having 2 text box.. Value of first text box should been an length of second text box.. Eg: If user gives First text box value as "10", then my second text box should not allow user to type more than 10 characters..

Here is my code..

function field_length()
var fieldValue= document.getElementById('Length').value;

<input type="text" name="Length[]" maxlength="2" class="required" id="Length" onkeypress="return isNumberKey(event);" placeholder="Field length" class="form-control">
<input type="text" name="Label[]" class="required" id="Label" maxlength="" onClick="field_length();" placeholder="Field Label" class="form-control">

In this code what i did was.. if user is gives value for first field as "5", on tap of second field it will alert the value.. But i want that value to be assigned to Maxlenght attribute. Give me some idea..

Answer Source

Get length and set maxLength attribute.

function field_length(){
   var length = $("#Length").val();
  $("#Label").attr("maxlength", length)
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