Function no special symbol input by using java script

function fncNoSplSymbl()
{

if(!((event.keyCode>=65 && event.keyCode<=90)||(event.keyCode>=97 && event.keyCode<=122)||event.keyCode==32||event.keyCode==48||event.keyCode==49||event.keyCode==50||event.keyCode==51||event.keyCode==52||event.keyCode==53||event.keyCode==54||event.keyCode==55||event.keyCode==56||event.keyCode==57||event.keyCode==13||event.keyCode==40||event.keyCode==41||event.keyCode==44||event.keyCode==45||event.keyCode==47))
{
event.returnValue=false;
}


}