function clearField(name) {
	if (document.getElementById(name).value == document.getElementById(name).defaultValue) {
		document.getElementById(name).value = "";
	}
}

function defaultField(name) {
	if (document.getElementById(name).value == "") {
		document.getElementById(name).value = document.getElementById(name).defaultValue;
	}
}

function clearPassword(name) {
	if (document.getElementById(name).value == document.getElementById(name).defaultValue) {
		document.getElementById(name).value = "";
		document.getElementById(name).type = "password";
	}
}

function defaultPassword(name) {
	if (document.getElementById(name).value == "") {
		document.getElementById(name).value = document.getElementById(name).defaultValue;
		document.getElementById(name).type = "text";
	}
}

function centerThis(div) {
    $(div).css("position","absolute");
    $(div).css("top", ( $(window).height() - $(div).outerHeight() ) / 2+$(window).scrollTop() + "px");
    $(div).css("left", ( $(window).width() - $(div).outerWidth() ) / 2+$(window).scrollLeft() + "px");
    return $(div);
}

function closePopup(id) {
	var div = "#" + id + "-popup";
	$(div).hide();
	$('#overlay').hide();
}




$.fn.centerInClient = function(options) {
    /// <summary>Centers the selected items in the browser window. Takes into account scroll position.
    /// Ideally the selected set should only match a single element.
    /// </summary>    
    /// <param name="fn" type="Function">Optional function called when centering is complete. Passed DOM element as parameter</param>    
    /// <param name="forceAbsolute" type="Boolean">if true forces the element to be removed from the document flow 
    ///  and attached to the body element to ensure proper absolute positioning. 
    /// Be aware that this may cause ID hierachy for CSS styles to be affected.
    /// </param>
    /// <returns type="jQuery" />
    var opt = { forceAbsolute: false,
                container: window,    // selector of element to center in
                completeHandler: null
              };
    $.extend(opt, options);
   
    return this.each(function(i) {
        var el = $(this);
        var jWin = $(opt.container);
        var isWin = opt.container == window;

        // force to the top of document to ENSURE that 
        // document absolute positioning is available
        if (opt.forceAbsolute) {
            if (isWin)
                el.remove().appendTo("body");
            else
                el.remove().appendTo(jWin.get(0));
        }

        // have to make absolute
        el.css("position", "absolute");

        // height is off a bit so fudge it
        var heightFudge = isWin ? 2.0 : 1.8;

        var x = (isWin ? jWin.width() : jWin.outerWidth()) / 2 - el.outerWidth() / 2;
        var y = (isWin ? jWin.height() : jWin.outerHeight()) / heightFudge - el.outerHeight() / 2;

        el.css("left", x + jWin.scrollLeft());
        el.css("top", y + jWin.scrollTop());

        // if specified make callback and pass element
        if (opt.completeHandler)
            opt.completeHandler(this);
    });
}