<html>
<body>
<script>
function replace(obj){
var str=obj.value;
str=str.replace("<","*").replace(">","*");
obj.value=str;
}
</script><input type="text" onblur="replace(this)" />
</body>
</html>
<body>
<script>
function replace(obj){
var str=obj.value;
str=str.replace("<","*").replace(">","*");
obj.value=str;
}
</script><input type="text" onblur="replace(this)" />
</body>
</html>
<body>
<script>
function replace(obj){
var str=obj.value;
var str1=/\</g;
var str2=/\>/g;
str=str.replace(str1,"*");
str=str.replace(str2,"*");
obj.value=str;
}
</script><input type="text" onblur="replace(this)" />
</body>
</html>
<body>
<script>
function replace(obj){
var str=obj.value;
var key=/\<|\>/g;
obj.value=str.replace(key,"*");
}
</script><input type="text" onblur="replace(this)" />
</body>
</html>