function validate(id)
{
num=id.value;
if(num.length<11)
{
alert("please enter 11 characters");
return false;
}
else
{
var numcount=0;
var alphabetcount=0;
for (n = 0; n < num.length; n++)
{
if( num.charCodeAt(n) >= 48 && num.charCodeAt(n) <= 57)
{numcount=numcount+1; }
else if((num.charCodeAt(n)>=65 && num.charCodeAt(n) <= 92) ||(num.charCodeAt(n)>=97 && num.charCodeAt(n) <= 122))
{alphabetcount=alphabetcount+1;}
}
}
}