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The value of the field with the id 'post_url' is http://www.example.com/. Shouldn't JavaScript return true for anything greater than -1?

alert('1a = ' + id_('post_url').value.indexOf('http:')     ); // 0
alert('1b'    + id_('post_url').value.indexOf('http:') > -1); // false
alert('2a = ' + id_('post_url').value.indexOf('www.')      ); // 7
alert('2b'    + id_('post_url').value.indexOf('www.')  > -1); // false

The value of the field with the id 'post_url' is http://www.example.com/. Shouldn't JavaScript return true for anything greater than -1?

alert('1a = '+id_('post_url').value.indexOf('http:'));//      0
alert('1b = '+id_('post_url').value.indexOf('http:') > -1);// false
alert('2a = '+id_('post_url').value.indexOf('www.'));//       7
alert('2b = '+id_('post_url').value.indexOf('www.') > -1);//  false

The value of the field with the id 'post_url' is http://www.example.com/. Shouldn't JavaScript return true for anything greater than -1?

alert('1a = '+id_('post_url').value.indexOf('http:'));//returns 0
 
alert('1b'+id_('post_url').value.indexOf('http:')>-1);//returns false
 
alert('2a = '+id_('post_url').value.indexOf('www.'));//returns 7

alert('2b'+id_('post_url').value.indexOf('www.')>-1);//returns false

In order to have both a string and a boolean alerted adding a second set of parenthesis as scragar suggested works...

alert('1b = '+(id_('post_url').value.indexOf('http:')>-1));//returns 1b = true

The value of the field with the id 'post_url' is http://www.example.com/. Shouldn't JavaScript return true for anything greater than -1?

alert('1a = ' + id_('post_url').value.indexOf('http:')     ); // 0
alert('1b'    + id_('post_url').value.indexOf('http:') > -1); // false
alert('2a = ' + id_('post_url').value.indexOf('www.')      ); // 7
alert('2b'    + id_('post_url').value.indexOf('www.')  > -1); // false

The value of the field with the id 'post_url' is http://www.example.com/. Shouldn't JavaScript return true for anything greater than -1?

alert('1a = ' + id_('post_url').value.indexOf('http:')     ); // 0
alert('1b'    + id_('post_url').value.indexOf('http:') > -1); // false
alert('2a = ' + id_('post_url').value.indexOf('www.')      ); // 7
alert('2b'    + id_('post_url').value.indexOf('www.')  > -1); // false

The value of the field with the id 'post_url' is http://www.example.com/. Shouldn't JavaScript return true for anything greater than -1?

alert('1a = '+id_('post_url').value.indexOf('http:'));//returns 0 

alert('1b'+id_('post_url').value.indexOf('http:')>-1);//returns false 

alert('2a = '+id_('post_url').value.indexOf('www.'));//returns 7 

alert('2b'+id_('post_url').value.indexOf('www.')>-1);//returns false

In order to have both a string and a boolean alerted adding a second set of parenthesis as scragar suggested works...

alert('1b = '+(id_('post_url').value.indexOf('http:')>-1));//returns 1b = true