function validateEmail(email)
{
	charList="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890_@.-"
	var flag = 1;
	var noOfAts  = 0;
	var noOfDots = 0;
	if((email.value.charAt(0) == "_") || (email.value.charAt(0) == ".") || (email.value.charAt(0) == "@") )
		{
		flag = 0
		}
	for(i=0;i<email.value.length;i++)
		{
		if(charList.indexOf(email.value.charAt(i))==-1)
			{
			flag = 0;
			break;
			}
		if(email.value.charAt(i) == "@" )
			{
			if(charList.indexOf(email.value.charAt(i+1))!=-1)
				noOfAts++;
			}	
		if(email.value.charAt(i) == "." )
			{
			if((email.value.charAt(i-1) == "@") || (email.value.charAt(i-1) == ".") || ((i+1) == email.value.length))
				{
				flag = 0
				break
				}
			noOfDots++;
			}	
		if(noOfAts > 1)	
			{
			flag = 0;
			break;
			}
		}
	if(noOfDots == 0)
		flag = 0;
	if(noOfAts == 0)
		flag = 0;	
	if(flag == 1)
		{
		return true;
		}
	else
		{
		return false;
		}
}