var myWindow;
function openCenteredWindow(url) {
    var width = 760;
    var height = 630;
    var left = parseInt((screen.availWidth/2) - (width/2));
    var top = parseInt((screen.availHeight/2) - (height/2));
    var windowFeatures = "width=" + width + ",height=" + height + 
        ",status,left=" + left + ",top=" + top + 
        ",screenX=" + left + ",screenY=" + top;
    myWindow = window.open(url, "subWind", windowFeatures);
}
/******** contact form ************/
function selectFirstField() {
	document.form1.txt_name.focus();
}