var s = "_xadadfa _Yadfadsf_Zasdf'adf"; s = s.replace(/_([^_])/g, "$1"); alert(s);
function myFunction_X(str,b){ var rString=/_X/gi if (rString.test(str)){ str=str.replace(rString,b); } return str; } alert(myFunction_X("_xadXdfa _Yadfadsf_Zasdf'adf","X"));
<!--
var str="_X_X_X_X_X_X_X_X";
str=str.replace(/_X/g,"X");
alert(str);
//-->
</script>
<!--
var str="_X_X_X_X_X_X_X_X";
str=str.replace(/_X/g,"X");
alert(str);
//-->
</script>
<script language="JavaScript">
<!--
var str="_asdf_fdas_as_sd_df_fg_gh_ag";
str=str.split("_");
str=str.join(" ");
alert(str);
//-->
</script>
s = s.replace(/_([^_])/g, "$1");
alert(s);
var rString=/_X/gi
if (rString.test(str)){
str=str.replace(rString,b);
}
return str;
}
alert(myFunction_X("_xadXdfa _Yadfadsf_Zasdf'adf","X"));