// JavaScript Document
function CheckEmail(emailval)
{
 i=0;
	if (emailval.length >0){
	    i=emailval.indexOf("@")
	    j=emailval.indexOf(".",i)
  	    k=emailval.indexOf(",")
	    kk=emailval.indexOf(" ")
	    jj=emailval.lastIndexOf(".")+1
	    len=emailval.length
	 }

	 if ((i>0) && (j>(1+1)) && (k==-1) && (kk==-1) &&
	     (len-jj >=2) && (len-jj<=3)) {
     }
	 else {
		  alert('please correct the email address: ' + emailval + ' is invalid!');
	      return false;
     }
     return true;
}