select/deselect input box for a site of my hosting.

[ultima]

I'm trying to implement an idea for a site of my hosting, but I need help. Can someone show a small example of how by clicking on the input box is highlighted and clicking for a second time is deselect (and change the text)?

[rasho]

With this line you can do selection of text box:

onClick="doSelect(this);"

The folowing code can does deselect:

var firstSelection = true;
function doSelect(el){
if( firstSelection ){
el.select();
firstSelection = false;
}
}