function check(e){
var key=0;
if(e.charCode){
 key=e.charCode;
 }
else {
 key=e.keyCode;
 }
if((key >= 48 && key <= 57)||key==8||key==9||key==13||key==27||key==46||(key >= 37 && key <= 40)) return true;
else return false;
}