Two ways to prevent pop-ups from alert

<script language=javascript>
function (str){
//This is empty
}
alert("fffffff");
</script>
Put the overloaded alert function definition function (str){} into a public js file and you will no longer be troubled by alert

If you want to prompt, use this method to define it
function (str){
// Open a mode dialog here to display the str string, delay 20ms, close
}