function IsNumeric(t_string) {
   var t_validChars = "0123456789.";
   var b_num = true;
   var c_char;
 
   for (i = 0; i < t_string.length && b_num == true; i++) { 
      c_char = t_string.charAt(i); 
      if (t_validChars.indexOf(c_char) == -1) {
         b_num = false;
      }
   }
   return b_num;   
}

function checkemail(str){
//var str=document.validation.emailcheck.value
	var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
	if (filter.test(str)){
		testresults=true;
	}
	else{
	
		testresults=false;
	}
	return testresults;
}