In etwa so?
<head>
<script type="text/javascript">
function blinker() {
for(k=0; k<document.getElementsByTagName("span").length; k++) {
if(document.getElementsByTagName("span")[k].style.visibility != "hidden") {
if(document.getElementsByTagName("span")[k].className.substr(0, 5) == "blink")
document.getElementsByTagName("span")[k].style.visibility = "hidden";
} else {
if(document.getElementsByTagName("span")[k].className.substr(0, 5) == "blink")
document.getElementsByTagName("span")[k].style.visibility = "visible";
}
}
var zeit = 750;
window.setTimeout("blinker()", zeit);
}
</script>
<style type="text/css">
span.blink_farbe {
color: #FF0000;
}
</style>
</head>
<body onLoad="blinker()">
Hallo! <span class="blink_farbe">Dieser Text 1 blinkt!</span>
Hallo! <span class="blink_farbe">Dieser Text 2 blinkt auch!</span>
</body>
hihihi