function verifyEmail(email) {
	if (email.length <=0){
	   return false;
	}
	i=email.indexOf("@");
	j=email.indexOf(".",i);
	k=email.indexOf(",*$;+=");
	kk=email.indexOf(" ");
	jj=email.lastIndexOf(".")+1;
	len=email.length;
	if (!((i>0) && (j>(1+1)) && (k==-1) && (kk==-1) && (len-jj >=2) && (len-jj<=3))) {
       return false;
    }
	return true;
}

function isDate(txtDate) {
    var objDate,  // date object initialized from the txtDate string
        mSeconds, // txtDate in milliseconds
        day,      // day
        month,    // month
        year;     // year
    // date length should be 10 characters (no more no less)
    if (txtDate.length !== 10) {
        return false;
    }
    // third and sixth character should be '/'
    if (txtDate.substring(2, 3) !== '/' || txtDate.substring(5, 6) !== '/') {
        return false;
    }
    // extract month, day and year from the txtDate (expected format is mm/dd/yyyy)
    // subtraction will cast variables to integer implicitly (needed
    // for !== comparing)
    month = txtDate.substring(0, 2) - 1; // because months in JS start from 0
    day = txtDate.substring(3, 5) - 0;
    year = txtDate.substring(6, 10) - 0;
    // test year range
    if (year < 1000 || year > 3000) {
        return false;
    }
    // convert txtDate to milliseconds
    mSeconds = (new Date(year, month, day)).getTime();
    // initialize Date() object from calculated milliseconds
    objDate = new Date();
    objDate.setTime(mSeconds);
    // compare input date and parts from Date() object
    // if difference exists then date isn't valid
    if (objDate.getFullYear() !== year ||
        objDate.getMonth() !== month ||
        objDate.getDate() !== day) {
        return false;
    }
    // otherwise return true
    return true;
}





<!-- Blink Functions -----
var b_timer = null; // blink timer
var b_on = true; // blink state
var blnkrs = null; // array of spans

function blink() {
var tmp = document.getElementsByTagName("span");
if (tmp) {
blnkrs = new Array();
var b_count = 0;
for (var i = 0; i < tmp.length; ++i) {
if (tmp[i].className == "blink") {
blnkrs[b_count] = tmp[i];
++b_count;
}
}
// time in m.secs between blinks
// 500 = 1/2 second
blinkTimer(500);
}
}

function blinkTimer(ival) {
if (b_timer) {
window.clearTimeout(b_timer);
b_timer = null;
}
blinkIt();
b_timer = window.setTimeout('blinkTimer(' + ival + ')', ival);
}

function blinkIt() {
for (var i = 0; i < blnkrs.length; ++i) {
if (b_on == true) {
blnkrs[i].style.visibility = "hidden";
}
else {
blnkrs[i].style.visibility = "visible";
}
}
b_on =!b_on;
}
//--> End Blink Functions