Uncaught TypeError: str.replace is not a function

In doing this review page, click on the button does not perform approval

Later F12 to see the console error found

Is not performed because flisnullandxyzero

Then figure out this method, which is a common method to copy out this method

Then use console.log output to find error

Discovery method to execute

if (Number (str.replace ( ". ", "")) <0) is stopped when the 

overall method --------------------------- -

function flisnullandxyzero(str) {
    console.log(str);
    if(null==str||( undefined==str)||(""==str)){
        return true;
    }else{
        console.log(Number(str));
        if(Number(str.replace(".","")) < 0){
            return true;
        }else {
            return false;
        }
    }
}
修改之后---------------------------

flisnullandxyzero function (STR) { 
    IF (== null || STR (STR == undefined) || ( "" == STR)) { 
        return to true; 
    } the else { 
        IF (Number The (STR) <0) { 
            return to true; 
        the else {} 
            return to false; 
        } 
    } 
} 
summary 
front page given time, the use of

  console.log (); commissioning