http://codereview.stackexchange.com/questions/38089/select-text-with-just-one-click#answer-38096

autoselect.jq.js

$.fn.OneClickSelect = function(){
      return $(this).on('click',function(){
        
         var range, selection;
         if (window.getSelection) {
            selection = window.getSelection();        
            range = document.createRange();
            range.selectNodeContents(this);
            selection.removeAllRanges();
            selection.addRange(range);
        } else if (document.body.createTextRange) {
            range = document.body.createTextRange();
            range.moveToElementText(this);
            range.select();
        }
      });
    };
    
    // Apply to these elements
    $('p, #all-select').OneClickSelect();

autoselect.js

function SelectText(element) {
    var doc = document,
        text = doc.getElementById(element),
        range,
        selection;
    if (doc.body.createTextRange) {
        range = document.body.createTextRange();
        range.moveToElementText(text);
        range.select();
    } else if (window.getSelection) {
        selection = window.getSelection();        
        range = document.createRange();
        range.selectNodeContents(text);
        selection.removeAllRanges();
        selection.addRange(range);
    }
}
$(function() {
    $('p').click(function () {
        SelectText('autoselect');
    });
});

index.html

<script src="http://code.jquery.com/jquery-latest.js"></script>
  
<div>
    <p>Some cool text!</p>
    <br/>
    <p>Some cool text!</p>
</div>

<div id="all-select">
    <p>Some cool text!</p>
    <br/>
    <p>Some cool text!</p>
</div>
<script id="jsbin-javascript">
$.fn.OneClickSelect = function(){
      return $(this).on('click',function(){
        
         var range, selection;
         if (window.getSelection) {
            selection = window.getSelection();        
            range = document.createRange();
            range.selectNodeContents(this);
            selection.removeAllRanges();
            selection.addRange(range);
        } else if (document.body.createTextRange) {
            range = document.body.createTextRange();
            range.moveToElementText(this);
            range.select();
        }
      });
    };
    
    // Apply to these elements
    $('p, #all-select').OneClickSelect();
</script>


<script id="jsbin-source-javascript" type="text/javascript">    $.fn.OneClickSelect = function(){
      return $(this).on('click',function(){
        
         var range, selection;
         if (window.getSelection) {
            selection = window.getSelection();        
            range = document.createRange();
            range.selectNodeContents(this);
            selection.removeAllRanges();
            selection.addRange(range);
        } else if (document.body.createTextRange) {
            range = document.body.createTextRange();
            range.moveToElementText(this);
            range.select();
        }
      });
    };
    
    // Apply to these elements
    $('p, #all-select').OneClickSelect();</script>