Get Focus on text box

[Ace]

Hi Everyone,

Currently, I have a text box that has text in it when it is loaded. for example, one says, "Enter Email Address". I have an onFocus command on the text box that erases the text leaving the text box blank when there is focus on it. However, I also want to have the cursor placed in the box when this happens. I have tried the following code and it erases the text like it should but it does not place the cursor in the text box. How can I get this to work?

function clear_EmailAddress()
	{
		if (document.SignIn.txtEmailAddress.value == " Enter Email Address")
		document.SignIn.txtEmailAddress.value = "";
                document.SignIn.txtEmailAddress.focus();
	}