improve selectionStart/selectionEnd properties/methods
improve selectionStart/selectionEnd properties/methods

fashionsun/webshim,tomascassidy/webshim,pablogrela/webshim,tomascassidy/webshim,webdev1001/webshim,aFarkas/webshim,webdev1001/webshim,aFarkas/webshim,ilovezy/webshim,pablogrela/webshim,tomascassidy/webshim,ilovezy/webshim,aFarkas/webshim,cl4rke/webshim,cl4rke/webshim,cl4rke/webshim,pablogrela/webshim,fashionsun/webshim,fashionsun/webshim,webdev1001/webshim,ilovezy/webshim