How to make the Default focus in content page from master page

Question

I have masterpage with content place holder. i have contentpage which is using master page . in all my content page i need to default focus on the text b

Answer 1

If you use jQuery, a possible solution is:

1. Give the textbox you want to set focus to a special class. "focus" works well for this purpose.

2. Write code such as the following in your master page or included by your master page in a js script file:

   $(document).ready    
   (
   
     function()
     {
       //get an array of DOM elements matching the input.focus selector
       var focusElements = $("input.focus").get();
   
       //if a focus element exists
       if(focusElements.length > 0)
       {
         focusElements[0].focus();
       }
     }
   );
   

A similar approach using vanilla JavaScript would be to tag the textbox with a special attribute. Let's use focus.

window.onload = function()
{
  //get all input elements
  var inputElements = document.getElementsByTagName("input");

  var elementToFocus = null;

  for(var i = 0; i < inputElements.length; ++i) 
  {
    var focusAttribute = inputElements[i].getAttribute("focus");

    if(focusAttribute)
    {
      elementToFocus = inputElements[i];
      break;
    }
  }

  if(elementToFocus)
  {
    elementToFocus.focus();
  }
};