function
IsTel(Tel){
var
re=
new
RegExp(/^((\d{11})|^((\d{7,8})|(\d{4}|\d{3})-(\d{7,8})|(\d{4}|\d{3})-(\d{7,8})-(\d{4}|\d{3}|\d{2}|\d{1})|(\d{7,8})-(\d{4}|\d{3}|\d{2}|\d{1}))$)$/);
var
retu=Tel.match(re);
if
(retu){
return
true
;
}
else
{
return
false
;
}
}