Accept Numeric With Hypen 0-9 -

function NumericWithHypen(object,e)//onkeyup

{

var Val=object.value;

var ValLen=object.value.length;

var allowChar=Numbers+"-";

/*var LastVal=Val.substring(ValLen-1);

if(allowChar.indexOf(LastVal) == -1)

{

object.value=Val.substring(0,Val.indexOf(LastVal));

}*/

for (i=0; i<ValLen; i++)

{

if(allowChar.indexOf(Val.charAt(i)) == -1)

{

object.value=Val.substring(0,i);

break;

}

}

}

<input name="txtOnlyHypen1" type="text" id="txtOnlyHypen1"
onkeyup="javascript:NumericWithHypen(this,event);" />