Prevent onClick event when selecting text

One option is to check the type of the Selection object returned by window.getSelection:

function toggleInfo() {
    var selection = window.getSelection();
    if(selection.type != "Range") {
        $("#clicktoshow").toggle();
        $("#information").toggle();
    }
}

http://jsfiddle.net/k61u66ek/4/

Update

If the browser you're targeting doesn't expose a type property on the Selection object then you can test against the length of the selected value instead:

function toggleInfo() {
    var selection = window.getSelection();
    if(selection.toString().length === 0) {
        $("#clicktoshow").toggle();
        $("#information").toggle();
    }
}

http://jsfiddle.net/k61u66ek/9/

which can in turn be reduced down to a bool check on toString:

if(!selection.toString()) {

http://jsfiddle.net/k61u66ek/10/

You could check if there is a selection made in the click event handler:

window.getSelection().toString();