var defaultButton = 'btnEntrer';

function OnKeyDown()
{	
	var button = document.getElementById(defaultButton);	
	
	if (event.keyCode == 13 && button != undefined) 
	{		
		//alert("onkeydown: " + defaultButton);
		button.click();
	}
}

function SetDefaultButton(newId)
{
    //alert(defaultButton);
    defaultButton = newId;
    //alert(defaultButton);
}

function SetDefaultFormButton(id)
{
    var form = document.getElementById("Form1");
    if(form != null)
    {
        form.defaultbutton = id;
        //alert(form.defaultbutton);
    }
}