How to control the text box to only input numbers and decimal points using js_javascript skills

The example in this article describes the method of using js to control the text box to only input numbers and decimal points. Share it with everyone for your reference. The specific implementation method is as follows:

Copy code The code is as follows:

function clearNoNum(obj) {
obj.value = obj.value.replace(/[^d.]/g, "");//Clear characters other than "numbers" and "."
obj.value = obj.value.replace(/^./g, "");//Verify that the first character is a number and not .
obj.value = obj.value.replace(/.{2,}/g, ​​"."); //Only keep the first one. Clear the redundant.
obj.value = obj.value.replace(".", "$#$").replace(/./g,"").replace("$#$", ".");
}

Usage is as follows:

Copy code The code is as follows:

I hope this article will be helpful to everyone’s JavaScript programming design.