JS Small function

1 delete left and right spaces

// Delete left and right spaces function Trim (str) {     return str.replace (/(^\s*) | ( \s*$)/g, "");}

2 Deciding whether to empty

// determines whether the empty function IsEmpty (s) {    returnnulltruefalse);}

3 determine if the input number is an integer

// determines whether the input character is an    integer function Ispositiveinteger (str) {    if (str.length! = 0)        {=/^\d*$/        ; if true {            returntrue;        }    }     return false ;}

4 determine if the character entered is a percentage (0 to 100 does not include 100 decimals)

// determines whether the input character is a percentage (0 to 100 does not include 100 decimals   ) function islimitpercent (str) {    if (str.length! = 0)        {=/^\d{1,2}[\.\d{0,2}]?$/;         Iftrue && str! = "0.00" && str! = "0.0")            {return true ;        }    }     return false ;}

JS Small function