How to Make Highlight Text Area

I hope the tutorials in this blog can useful for you. at this time I still have time to make some tutorial for you before going to bed. now I wanna give you the material about "How to make High Light Text Are" The highlight text area is very useful for the visitors who wanna copy the code at your blog and paste it in their blog. It will decrease the risk of failure copying the code. The example button is like at this post The step is just copy the code below to your post...just it

<div><form name="copy"><div align="center"><input onclick="javascript:this.form.txt.focus();this.form.txt.select();" type="button" value="Highlight All"> </div><div align="center"></div><p align="center"><textarea style="WIDTH: 300px; HEIGHT: 144px" name="txt" rows="100" wrap="VIRTUAL" cols="55">Put Your Text / Code here