function isNumber(inputStr) {
for (var i = 0; i < inputStr.length; i++) {
var oneChar = inputStr.substring(i, i + 1)
if (oneChar < "0" || oneChar > "9")
return false

}
return true
}


function check_email(xemail)
{
var email_charts="0123456789abcdefghijklmnopqrstuvwxyz_-.@";
var e_array=xemail.split("");

if(xemail.indexOf(".")<0 || xemail.indexOf("@")<0 || xemail.length<7 || xemail.indexOf("@")!=xemail.lastIndexOf("@")) return false;

for(i=0;i<e_array.length;i++)
{
 if(email_charts.indexOf(e_array[i])<0) return false;
}

return true;
}