function isDate(d){
var checkstr = "0123456789";
var DateField = d
var Datevalue = "";
var DateTemp = "";
var seperator = ".";
var day;
var month;
var year;
var leap = 0;
var err = 0;
var i;
err = 0;

  DateValue = d;
   /* Delete all chars except 0..9 */
   for (i = 0; i < DateValue.length; i++) {
	  if (checkstr.indexOf(DateValue.substr(i,1)) >= 0) {
	     DateTemp = DateTemp + DateValue.substr(i,1);
	  }
   }
   DateValue = DateTemp;

date_parts=d.split("/")
	
if(date_parts.length!=3)
	return false
	
month		= parseInt(date_parts[0], 10)
day		= parseInt(date_parts[1], 10)
year		= parseInt(date_parts[2], 10)

  if (!isNumber(month)){
     err = 50;
  }
  if (!isNumber(day)){
     err = 51;
  }

  if (!isNumber(year)){
     err = 52;
  }


   /* year is wrong if year = 0000 */

   if (year == 0) {
      err = 20;
   }
   /* Validation of month*/

   if ((month < 1) || (month > 12)) {
      err = 21;
   }
   /* Validation of day*/

   if (day < 1) {
     err = 22;
   }
   /* Validation leap-year / february / day */
   if ((year % 4 == 0) || (year % 100 == 0) || (year % 400 == 0)) {
      leap = 1;
   }
   if ((month == 2) && (leap == 1) && (day > 29)) {
      err = 23;
   }
   if ((month == 2) && (leap != 1) && (day > 28)) {
      err = 24;
   }
   /* Validation of other months */
   if ((day > 31) && ((month == "01") || (month == "03") || (month == "05") || (month == "07") || (month == "08") || (month == "10") || (month == "12"))) {
      err = 25;
   }
   if ((day > 30) && ((month == "04") || (month == "06") || (month == "09") || (month == "11"))) {
      err = 26;
   }
   /* if 00 ist entered, no error, deleting the entry */
   if ((day == 0) && (month == 0) && (year == 00)) {
      err = 0; day = ""; month = ""; year = ""; seperator = "";
   }
   /* if no error, write the completed date to Input-Field (e.g. 13.12.2001) */
   if (err == 0) {
      return true
   }
   /* Error-message if err != 0 */
   else {
     return false
   }

}

//Check for a valid number
function isNumber(inputVal){
	oneDecimal=false
	inputStr=inputVal.toString()
	for(var i = 0; i < inputStr.length; i++){
		var oneChar=inputStr.charAt(i)
		if(i==0&&oneChar=="-")
			continue
		if(oneChar=="."&&!oneDecimal){
			oneDecimal=true
			continue
		}
		if(oneChar<"0" || oneChar > "9")
			return false
	}
	return true
}




function isInteger(inputVal){
	var inputStr
	inputStr=inputVal.toString()
	for (var i = 0; i < inputStr.length; i++) {
		var oneChar = inputStr.charAt(i)
		if (i == 0 && oneChar == "-") {
			continue
		}
		if (oneChar < "0" || oneChar > "9") {
			return false
		}
	}
	return true
}


function emailvalidte(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid E-mail ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

 		 return true					
	}